The door of the room was pushed open by Liu Cheng, who smiled and made an inviting gesture to Cai Yan.
After Cai Yan saluted Liu Cheng, he walked towards the room.
Liu Cheng then entered and closed the door of the room...
…
…
In the room, Cai Yong was putting away the pen from a piece of paper, holding the paper in both hands, and respectfully handed the paper to Liu Shui next to him: "Little friend, check it out and see.
Are there any mistakes in my calculations?"
Liu Shui took the paper handed over by Cai Yong and began to read it meticulously.
Cai Yong stood aside, focusing his attention on the paper held in Liu Shui's hand, and watched intently as Liu Shui checked what he had written.
Even Cai Yan could see some nervousness on his father's face, as if he was afraid that something would go wrong.
Seeing such a scene, Cai Yan was stunned.
I just feel like my usually smart brain doesn't work anymore.
What is all this?!
Yesterday evening, what the people who came from the emperor's uncle's house said were actually true?
His father is actually here to study with his newly accepted disciple?!
this……
This is too shocking!
For a moment, Cai Yan didn't know how to describe his mood.
Liu Cheng, who was standing next to him, looked at Cai Yan, who was so surprised that he couldn't help but open his mouth wide. He could see some white teeth, and he felt that the itch in his heart became even more intense.
He regretted that he did not seize the perfect opportunity to lead Cai Yan to another room, but led him to the study.
Of course, thinking this way, Liu Cheng still knew the seriousness of the matter.
I don’t know how many ideas a person will have in a day, but he will actually put them into action, not even a tenth of them...
"Ah, grandpa, you, you..."
After being stunned for a while, Cai Yan finally spoke.
It's just that Cai Yan, who has always been articulate, could not even say a single word at this time.
Cai Yong, who was waiting attentively for Liu Shui to check his calculation steps, couldn't help but trembled when he heard this and was startled.
It was only at this time that Cai Yong and Liu Shui discovered that at some point, there were two more people in the room.
"Zhao Ji? Why are you here?"
Cai Yong looked at Cai Yan for a while, then realized what he was doing and asked.
"Grandpa, are you really doing arithmetic?"
Cai Yan did not answer Cai Yong's question, but asked like this, and took a few steps forward to look at the paper in Liu Shui's hand.
Now, after seeing such a scene with her own eyes, Cai Yan's curiosity almost burst her chest.
Of course, this also has something to do with the fact that her chest is relatively flat, not broad and stalwart enough, and the corresponding volume is relatively small...
As a very famous talented woman in history, Cai Yan was not only knowledgeable in literature, but also knowledgeable in arithmetic. After all, her father was very knowledgeable in arithmetic.
She wanted to see what topic was written on this piece of paper, and she was able to confuse her father into this!
His eyes fell on the paper Liu Shui was holding. After seeing clearly what you wrote on the paper, Cai Yan suddenly became even more confused.
Because she discovered that she actually couldn’t understand the question!
Not only the title, but also everything densely written on the paper, she couldn't understand...
The famous talented woman in history glanced at the faces of the people in the room one by one, and then returned to the piece of paper in Liu Shui's hand. For a moment, she was unable to say a word...
…
…
"These are Arabic numerals. This calculation method is called vertical calculation. These are all taught to me by my brother..."
Liu Shui once again opened his mouth to explain.
"I have never seen or heard of these things before. The most rare thing is that they are so easy to use!
Uncle Emperor, how do you know these things?"
Cai Yan looked at Liu Cheng, his eyes full of exploration.
Just as Liu Cheng was about to speak and explain, he heard a voice next to him: "My brother said that this was some time ago, my uncle saved a Hu Shang, and this Hu Shang taught it to his uncle. The uncle thought it was useful, so he gave it to his uncle.
When the elder brother grew up, he gave these teachings to his elder brother.
The elder brother said that his uncle had not allowed him to spread the word about this before.
On the one hand, this is because this calculation method and the way numbers are written are different from our common words. We are worried that once it is revealed, it will cause trouble for ourselves.
On the other hand, it is because this thing does have its advantages, and my uncle plans to pass it on as a family heirloom..."
Liu Cheng closed his mouth and stood here with Cai Yan listening to Liu Shui tell the lies he told Liu Shui.
Sometimes, meeting some children in some matters is really a headache.
When Cai Yan heard what Liu Shui said, he turned his attention to Liu Cheng beside him, looking extremely surprised.
This kind of arithmetic has never been seen before, but it is very mysterious. It seems to have its own system of arithmetic. It is actually coming from the hands of this fierce general who can rival Lu Bu?
"Inadvertently, I saw the secret knowledge of the imperial uncle's family, little girl..."
After Cai Yan came to his senses, he quickly apologized to Liu Cheng.
People these days are still very particular about learning, especially family studies.
"Senior sister, you don't have to be like this. My brother said that knowledge is for use. Many things eventually declined because many people cherished them and only wanted to pass them on to their descendants.
Only by teaching more people and promoting it can a knowledge be able to exert its true value.
Only then can everyone's wisdom be pooled to make this knowledge better and more novel, so that it will not be lost in history..."
Cai Yan stood there stunned.
After a moment like this, she bowed deeply to Liu Cheng, who wanted to speak but couldn't get the words out for a while...
