Daming: Mixed in Dangzhi County, Beiping

Chapter 33 You want to teach me the art of oral arithmetic!

After reading two books in a row, Zhu Di finally discovered the clue.

When looking at each ledger, Guo An muttered a few words every time he turned a page.

"Are you learning from Master Daoyan to recite scriptures?"

"..."

Guo An was interrupted, and looked up at Zhu Di in a daze, "Your Highness, are you talking about being an official?"

"Could it be that the king is talking to himself?" Zhu Di said with a look of disgust.

Guo An curled his lips, and said contemptuously: "Your Highness is so ignorant, this official is just counting!"

Zhu Di's face darkened immediately, "You thief officer, how dare you look down on me?"

Guo An was startled, and slapped himself secretly in his heart, and quickly apologized with a smile: "Your Highness heard it wrong. The lower official said that this is the oral arithmetic method created by the lower official. Only the lower official can know it. Naturally, His Highness has never seen it before!"

Zhu Di was full of curiosity, "A method of verbal arithmetic?"

"Go on!"

"Yes, Your Highness!"

Guo An hurriedly continued to check the account book, and now there are dozens of old men lining up behind him, so he must hurry up!
On the side, looking at Guo An who was muttering again in a low voice, Zhu Di listened carefully for a while, but still didn't hear a word clearly, so he couldn't help feeling a little anxious.

If one learns this miraculous method of verbal arithmetic, whether it is counting the supplies in the army or arranging troops, it will have a huge effect.

Therefore, after Guo An continued to check the three ledgers, he finally couldn't help it.

"It's so slow for one person to check, why don't you call a few more scribes to check!"

"..."

Guo An's train of thought was interrupted again, and he couldn't help but frowned slightly, "Don't make trouble, Your Highness, there are still so many old people waiting outside, I have to go through it quickly.

Counting these clerks one by one is slow to death, and the subordinate officials can hang and beat several of them by themselves. It is better to let them write IOUs, this is the best use of people! "

Zhu Di said: "It's okay, you can speak louder, and I will listen to your oral arithmetic process! Maybe, when I was a child in Dabentang, I also learned this oral arithmetic method!"

"Speak louder... Ugh!"

Guo An subconsciously glanced at Zhu Di, but found that Zhu Di was looking at him confidently.

"it is good!"

Guo An chuckled, he had seen how thick-skinned this famous Emperor Yong Le was!

"Forty stones, thirty stones, seventy stones, fifteen stones, eighty-five stones, twelve stones, ninety-seven stones...nine stones, one thousand one hundred and eighty stones!"

Before it was time for a cup of tea, Guo An seemed to be repeating the number.

Afterwards, he wrote down the figures he had calculated on the ledger in his hand, and handed it to the old man who was waiting by the side.

"Take it and get the IOU!"

"Thank you for the county!"

When the old man left, Guo An continued to take the ledger and read it.

At the same time, count out aloud.

But in Zhu Di's eyes, Guo An in front of him was still thinking about numbers!

After the old man in the public house changed, Zhu Di still didn't understand, and his face couldn't help getting darker and darker.

Fortunately, a scribe at the side moved a chair with a wink, which did not make His Royal Highness Yan tired.

"I don't know if the oral and arithmetic methods of the lower officials are the same as what His Highness learned in the Dahontang of the Yingtian Palace?"

After all the old people in the public house went out, Guo An asked Zhu Di with a half-smile.

"It's different!"

Zhu Di replied in a low voice, "The oral calculations you use are similar to Master Daoyan's reciting scriptures. I have never seen such a method of oral calculations in Ming Dynasty!"

"Then I wonder if His Highness is interested in this method of oral calculation?"

Guo An continued to ask: "With this method, any mistakes in the ledger will hardly escape His Highness's eyes!"

"Ok?"

Zhu Di was overjoyed, "This is your unique technique, are you willing to teach this technique to me?"

Guo An quickly said: "In the past few months, Your Highness has helped Xiaguan's Wanping County a lot. This official is not the kind of ungrateful person. If Your Highness wants to learn, this official can't wait to ask for it!"

"Ok?"

Zhu Di's face darkened, "Your mother, didn't you want to teach this king? Why did you become this king and want to learn?"

Shameless!

Guo An's face froze, "Yes, yes, it is the lower official who wants to repay His Highness' kindness, and wants to teach His Highness!"

Hearing this, Zhu Di nodded in satisfaction.

"So, why don't you quickly teach this king, the miraculous arithmetic method you use?"

"Your Highness, wait a moment!"

After saying that, he walked to the side.

Ning Deyou and a group of household officials were also full of joy, and they hurriedly followed. Under Zhu Di's surprised gaze, they lifted two wooden shelves of the same size from the corner of the public house.

On each wooden shelf, there is a wooden board the size of a table case. The wooden board has been painted with black paint and is pitch black.

And on a wooden board, there is a large string of barbarian numbers written on it.

Seeing this, Zhu Di suddenly realized.

"Are you counting in Arabic numerals?"

"Your Highness is wise!"

Guo An nodded slightly, and after straightening the blackboard, he took out several cut limestones the size of human fingers from a wooden box beside him.

"Your Highness, although the strength of those overseas barbarians is not as strong as mine, the number they invented is a good thing. Not only is it very convenient to write, but it is also very convenient to calculate!"

"When these numbers are added together, you can add the rest to write, one plus two, or twelve plus twenty, or 110..."

"This is just addition and subtraction of numbers. If it is paired with the nine-nine multiplication formula, it can be calculated no matter how many digits are multiplied. For example...

And the division method is the same..."

What Guo An said above was very fast and clear, but Zhu Di, who was exposed to Arabic numerals for the first time, was dumbfounded.

"How about it, I wonder if Your Highness understands?"

After finishing the last one, Guo An put down the lime pen in his hand, patted it lightly, and asked Zhu Di.

Zhu Di said with disdain on his face: "It's just the numbers brought into my Ming Dynasty by a few barbarians. How can this king not understand?"

Guo An directly laughed and said, "Your Highness is indeed extremely intelligent! Now that His Highness has already learned it, the next official will go out for lunch. I wonder if His Highness will come with you?"

"Lunch, when is it?" Zhu Di asked.

Guo An quickly replied: "Your Highness, it's the end of the day, aren't you hungry?"

"Wei time?"

Startled, Zhu Di raised his head and glanced outside the door. All the old people outside had already left cleanly!

"Those old men have also left?"

Guo An said, "Your Highness, they will continue to come to Yamen after lunch in the afternoon!"

After Zhu Di pondered for a while, he said, "Well, since you have kindly invited me, I will taste the food of your county government!"

"..."

Guo An sighed softly, "I am very grateful!"

"Hahaha, you magistrate is an honest person!"

"..."

……

(End of this chapter)