Less than half a year after arriving in the Tang Dynasty, Li Qinzai didn't want to set up a "wise and expert" persona. He was too tired and too pretentious.
In his previous life, he only scored more than 400 points in the college entrance examination. He was an expert and only took two classes. During college, he was late and skipped class to fall in love. After four years of campus life, he was familiar with the karaoke bars, bars and restaurants outside the school. On the contrary, he was the school's
He had no idea what the library looked like.
Failing a course at the end of the semester was so commonplace that Li Qinzai had to cry and repent in front of his subject teacher every semester in order to gain the teacher's temporary softness and return to school, so that he could continue his decadent university life in the next semester.
If Li Zhi knew about this master's behavior in his previous life, he would probably call for a sword and axe, and chop this deceitful master to death.
Having come to the Tang Dynasty a long time ago, Li Qinzai already knew that the ancients actually did quite a lot of research on mathematics, such as "Nine Chapters Sutra", "Haidao Suan Jing", "Zhou Bi Suan Jing", etc., which are about as good as those of later generations.
mathematics textbook.
Well-known pi, when the indigenous hozens in Europe and America were still gathering wild fruits in the mountains and sleeping in caves, the ancient Chinese ancestors had already calculated the seven decimal digits of pi.
His achievements are nothing short of impressive, and his research on mathematics is also very in-depth. Unfortunately, the imperial court does not attach great importance to Mingshu. Every time he takes a scientific examination, the talents in Mingshu are far inferior to those in Mingjing. There are only a few people after high school.
, is also to take up any idle position and let it fend for itself.
This has led to the decline of talents in Mingshu Science and Technology, and the emperor and his ministers have never thought about the impact that the decline of Mingshu Science and Technology talents will have on the country, because it seems to have no impact at all.
Today, Li Qinzai taught Li Zhi a good lesson with mathematical knowledge in front of Li Zhi.
A clear calculation is very effective, whether in ancient times or modern times, and its impact on the country is also very significant.
Staring at the formulas on the sand, the series of Arabic numerals and strange symbols, Li Zhi's eyes almost bulged.
"These...did you just calculate it? Just using this bunch of weird things?" Li Zhi asked in disbelief.
Li Qinzai nodded: "Yes, this is just one of the functions of Mingshu Ke. It can be used in various aspects."
"How to calculate the height of the beams, the size of the bricks, and the depth of the foundation when building a house."
"The army's logistics supplies include how much food and fodder is transported, how many horses are provided by the civilians, and how long it takes to get from point A to point B."
"When wheat is planted in an acre of land, what is the distance between the wheat seeds horizontally and vertically, what is the total number, and what is the estimated yield."
"Your Majesty, all the knowledge that is needed in every aspect of life can be easily obtained by Mingshu. Just like what I just did, you can draw a series of weird symbols and you can get the answer in a moment."
Li Zhi couldn't help but straighten his body. At this time, he really began to listen.
"What does this weird string of symbols mean?"
"I call them arithmetic symbols and Arabic numerals..."
Li Zhi frowned: "What is Arabia? Is it a place name? Why isn't it called 'Datang Numbers'?"
"Well, you can call it whatever you want. It actually originated from Tianzhu. It was spread to Dashi many years later before it became really popular. It is very simple and convenient to use to remember numbers."
Li Zhi looked unhappy when he mentioned "big food" and couldn't help but snort.
Dashi is what was called Middle East Arabia in previous lives, bordering the Western Regions of the Tang Dynasty.
During the Zhenguan period, the Tang Dynasty established the Western Regions, destroyed the Gaochang Kingdom, and established the Anxi Protectorate in Xizhou to rule the thirty-six countries in the Western Regions. From Zhenguan to the present Longshuo period, the Anxi Protectorate and the Western Turks and Dashi in the Western Regions had
There was a lot of friction, and Datang and Dashi were old enemies.
Li Qinzai used a long stick to demonstrate on the ground and said: "If we use our Chinese characters to count, such as nine thousand eight hundred and seventy-six, Your Majesty, please see, the thousands number requires seven characters, which is slow, inconvenient, and very difficult.
It is easy to make mistakes, if you use Arabic numerals..."
"Datang numbers!" Li Zhi corrected in a serious tone.
"Uh, yes, Datang numbers."
I don't dare to argue with Li Zhi. All intellectual property rights and origins are all clouds. As long as I think it belongs to the Tang Dynasty, then it belongs to the Tang Dynasty. I won't accept it.
"Ahem, using Tang Dynasty numerals, the number of thousands can be written by just gesturing with four symbols."
As he spoke, Li Qinzai wrote the four numbers "9876" on the sand.
Li Zhi's eyes widened, he compared the differences between numbers and Chinese characters, and then nodded slowly: "Yes, it is indeed easy to use. Were these symbols created by Jing Chu?"
"Your Majesty, I just said that it originated from Tianzhu, and later..."
The gentle and elegant Li Zhi was exuding an imperial aura at this time. He interrupted his words with a heavy wave of his hand and said calmly: "Never mind, it was created by Jing Chu. Take it over and let Datang use it. From now on, it will be called Datang."
number."
Li Qinzai grinned. This unreasonable face looked very much like a woman in love. Did he learn it from Empress Wu?
Li Zhi pointed to the arithmetic symbols again and said: "These weird symbols..."
Li Qinzai learned the lesson this time and said confidently and firmly: "It's all created by me, and the copyright is exclusive. Violators will be prosecuted."
Li Zhi smiled with satisfaction and was very pleased that Li Qinzai was on the road.
"The time you calculated for the pursuit of the two armies just now...is it really Mingshu's algorithm?"
"Yes, I call it a 'mathematical formula'. All things in the world can use formulas to demonstrate their laws. Once you understand these laws, everything will be under control."
Li Zhi was shocked. He was an emperor. No matter how gentle and elegant he was, he was also an ambitious emperor. He was particularly fond of the words "everything is under his control".
Li Qinzai was really worried that the hypertensive patient in front of him would be so excited that his blood vessels would burst. If something happened in the Li family's village, Li Qinzai would be tricked to death.
So Li Qinzai hurriedly explained: "I'm exaggerating. I just meant the calculation method, not that I can really master it. Even if everything in the world has not been calculated, it is already under your control. The way of clear calculation is just to let the world understand it better."
It’s just the law of all things.”
Li Zhi's expression gradually calmed down. It was obvious that he was no longer a hot-blooded middle-aged middle school student, and his congested blood vessels were no longer so boiling.
"I didn't expect Mingshu Ke to be so useful..." Li Zhi murmured.
Li Qinzai said: "Your Majesty, if you make a clear calculation, it will be of great use to the country. It can be as big as marching formations, farming, and as small as clothing, food, housing, transportation, houses, bridges, etc. The rules can be calculated in advance..."
"But I heard that the imperial court recruits only a few people every year for Ming Dynasty arithmetic. It is such a great use of arithmetic, but there are so few scholars. If this knowledge is lost, it will be a great loss to the Tang Dynasty."
Li Zhi stared at the formulas on the sand in trance. For a long time, Li Zhi smiled bitterly and said: "Perhaps the court did not pay enough attention to arithmetic, but Jingchu might as well think about it again. In addition to Jingchu, there are people who are so proficient in arithmetic in the world.