Seeing that he had succeeded in showing off again, Xia Yu felt proud: "How about it, gentlemen, I said half an hour will be enough. I'm not bragging, right?"
I'm not bragging, but we were scared to death! Everyone looked at each other and smiled bitterly, only feeling full of frustration.
This Xia Military Advisor is proficient in military strategy and has an insight into people's hearts. Unexpectedly, his achievements in arithmetic are also amazing. Is this Guigu disciple really so awesome!?
"Military advisor," Fang Xuanling couldn't help but said, "What kind of magic is this, how can it be fast and accurate?"
"Well, this involves a lot. First it's Arabic numerals, then statistics, and then quick calculations."
What Arabic numerals?
What statistics?
What is a quick calculation?
Everyone's faces were full of questions. Although they didn't understand anything, they were still a little confused.
"Military advisor," Xue Shou was thinking smartly and suddenly couldn't help but ask: "Are these the secret techniques of Ghost Valley that you are talking about?"
Xia Yu was stunned for a moment, then quickly followed the trend and said: "Yes, yes, that's exactly it."
Now he felt more and more that the name Guigu disciple was useful. If there was anything difficult to explain, he would just use Guigu's door to block the gun.
Everyone has confidence in the safekeeping.
The secret technique of Guigu! When everyone heard it, their faces were filled with awe, and they instinctively felt that this must be something very extraordinary.
"Military advisor," Fang Xuanling changed his mind and asked tentatively: "You just said that these secret techniques can be taught to everyone?"
"Of course." Xia Yu shrugged. He didn't think these were precious. He smiled and said, "Everyone can listen to whatever they want to learn."
"Great!" Everyone cheered immediately.
You must know that in ancient times, knowledge was an extremely precious asset. Many classics that were common in later generations are now treasured only by wealthy families.
In particular, some famous military books, such as "The Art of War" by Sun Tzu, are the objects of strict control by the court and major aristocratic families.
Let alone anyone who has learned it, even taking a look at it is a luxury.
Therefore, when they heard that Xia Yu was willing to teach Guigu's secret skills, everyone went crazy with joy.
In fact, even Feng Deyi, Gao Shilian, Yu Wenshi and the other three, despite their age, were all moved.
Who can have too much of a good thing?
If you have such a unique skill, your family business will be ruined in the future, and maybe your descendants will be able to make a future by relying on this.
As for learning from young people, is it shameful?
Are you superficial, don’t you know that a master is a teacher?
"May I ask the military advisor, when can we start?" Du Ruhui, a thin man, was the first to wait impatiently. This famous official of Zhenguan, known as "Fang Gu Du Duan", was a fan of arithmetic.
"I'm not busy anyway. If you have time, you can start now."
"I'm not busy. I'm not busy. Come on, clear the desk quickly and ask the military advisor to give a lecture." Everyone expressed their opinions one after another. It is rare for a good thing to happen in the world. Whoever says he is busy now is a fool.
Everyone was busy for a while, quickly putting away the messy desks and setting them up to look like a small classroom.
At the front of the class was a huge whiteboard, and Changsun Wuji, a fat little boy, kindly handed over a charcoal pen.
Good guy, it’s completely different from modern blackboard pens.
Standing in front of the whiteboard, Xia Yu instantly felt like a teacher.
Especially when there were a bunch of famous people sitting in front of him, Xia Yu felt a little excited.
"My lords, let's learn Arabic numerals first. This is the basis of my Guigu arithmetic."
"Military advisor, why are they called Arabic numerals? It sounds strange." Changsun Wuji asked curiously.
Just as Xia Yu was about to explain, she suddenly realized: Oh, it seems that the Arab Empire has not been established yet!
"Oh, it's like this. Arabic numerals originated in ancient India, that is, Tianzhu. Later, one of our sages from the Guigu sect visited Tianzhu and discovered this kind of numerals. He thought they were very useful, so he improved them. To commemorate this.
This sage, this number is called by his name in the sect." Xia Yu said nonsense seriously.
Good guy, he is also a genius. What he said is so smooth and ridiculous!
"I see!"
But everyone suddenly realized that it was very reasonable, but the name of this sage was a bit strange, it sounded like an old farmer in a mountain village.
It seems that an expert is an expert, even his name is extraordinary.
Xia Yu almost laughed out loud when she saw that a group of famous Zhenguan officials were fooled into being stunned.
He quickly wrote the Arabic numerals from 0 to 10 on the whiteboard with charcoal and explained their meanings to everyone one by one.
Everyone took notes carefully for fear of missing anything.
After all the arrangement rules were explained clearly, an hour had passed.
"Great." Du Ruhui, who seemed a bit rigid, slapped his thigh happily: "With these Arabic numerals, accounting is much easier."
"Yes," Fang Xuanling also said with emotion: "In the past, when calculating money and food, it would take a long time to write down any number, but now it only takes a few strokes. It's really amazing. The secret technique of Guigu is really mysterious!"
Everyone nodded, obviously they had suffered enough in the past to settle accounts.
"Military advisor," Xue Sou was still clever and handed over a cup of herbal tea and said, "You must be thirsty. Drink a cup of herbal tea to reduce the heat and eliminate the internal heat."
"Thank you." Xia Yuzheng said, her mouth was dry and her tongue was dry, so she quickly took it and drank it down in one gulp.
It tastes good, a little sweet.
Next, Xia Yu kept up her efforts and talked about statistics again.
In fact, it is very simple. It is nothing more than using tables to summarize and organize various numbers to make it simple, concise and clear at a glance.
Xia Yu has never studied accounting, but he has a stupid idea.
Make a table of income and a table of expenses. Comparing the two, the accounts will be much clearer.
Although this is very basic, it is already very useful now. At least, Feng Deyi, Fang Xuanling and others are very satisfied with it.
That's enough, isn't it?
Finally, when it came to quick calculations, Xia Yu was a little embarrassed.
Mental arithmetic and written arithmetic may be a bit complicated for the ancients, and they probably won't be able to teach them for a while. It's better to teach them something simple and clear.
He looked at the sky and saw that it was already evening. He had been busy all afternoon without realizing it.
"My lords, there are many kinds of quick calculations. I will teach you the most practical abacus calculation, but it is getting late. Let's find time tomorrow."
"That's Military Advisor Lao." Everyone thanked him one after another.
"Lord Yuwen," Xia Yu looked at Yuwen Shiji: "Please send me a few craftsmen who are clever and ingenious later. I need tools to learn abacus. These tools are hundreds of times better than the arithmetic chips you use."
"Okay, okay, military advisor, don't worry, I'll make arrangements right away." Yu Wenshi confirmed with a heartbeat.
He has gained a lot today. Don't forget that the craftsmanship, carriages, horses, and camps he is responsible for also require contact with a large number of numbers.
The Arabic numerals and statistics he learned today helped him a lot.
"Okay, everyone, let's see you tomorrow."
Hearing this, everyone looked at each other and, led by Feng Deyi, they all stood up and returned the favor with the teacher's salute: "I send you my military advisor here."
Xia Yu was caught off guard. The great gift from these famous Zhenguan officials made him stunned. He hurriedly said: "My lords, it's passed! It's passed! I don't dare to deserve it."
"The military advisor is selfless," Fang Xuanling said solemnly, "How can we forget our roots?"
"Yes, yes." Everyone nodded, all sincerely grateful.
To them, Xia Yu's kindness in teaching skills is real. How can a gentleman pretend to be at ease when he is magnanimous?
Xia Yu had no choice but to give up.
Just as he was about to turn around, he suddenly saw a lot of white paper on Fang Xuanling's table, so he took a big stack of them without any courtesy: "I'll get some paper and think about it tonight, how to teach everyone abacus tomorrow."
Fang Xuanling hurriedly said: "The military advisor will just take it. If it is not enough, I will have someone send it to me."
