Datang: Let you supervise the country and become an emperor through the ages

Chapter 252
Li Shimin smiled and waved his hands, signaling Li Gang to continue, so Li Gang began to teach Li Tai, "His Royal Highness, you can think about it, ten 760, is it seven thousand six hundred?"

"One hundred 760s is 760, one thousand 76s is 760, and now there are 76 76s, that is [-] plus half of [-], so the sum can be obtained. s answer."

"Well, the master's method is good, but if it is 650 seven boxes of money, how can it be calculated conveniently?" Li Shimin asked after listening to Li Gang's words, casually mentioning a number.

"This, this..." Li Gang frowned when he heard such a complicated number, and said after thinking for a long time.

"In fact, this can also be calculated separately, that is, first count four thousand 760, then count six hundred 760, then count fifty 760, and finally count seven 760, and finally add up several numbers to get The results."

"Hahaha..." Li Shimin shook his head and said with a smile, "Mr.'s calculation is probably not much better than Qing Que's calculation just now."

"Huh?" Li Gang's face changed suddenly when he heard Li Shimin's words.

As a master of contemporary arithmetic, Li Gang thought to himself that his algorithm is extremely simple. If someone else is like Li Tai, he might not be able to figure out the problem that Li Shimin just said for a year!

But Li Gang didn't expect that the algorithm he was proud of, in the eyes of Li Shimin, was actually said to be not very clever. Li Gang couldn't bear it, and the old man stood up immediately.

"Your Majesty!" Li Gang decided to pay respects first, "Could it be that you have a better calculation method than the old minister?"

Li Tai, who was standing by the side, was actually shocked when he heard Li Shimin's words. He studied math under Li Gang, so he naturally knew Li Gang's math skills and what level he was in the Tang Dynasty. As Li Shimin's son, he also I know Li Shimin's level of arithmetic.

But now his father, the emperor, actually dismissed Li Gang's ability in calculations, which made Li Tai a little confused.

What's wrong, father?Lost your mind?Is it because I lost him more than a billion dollars?Not so!
Hearing Li Gang's question, Li Shimin burst into laughter and said: "Of course I have a better calculation method than Mr., and it is infinitely simpler than Mr.'s calculation method!"

"Then, I would like to ask Your Majesty to enlighten you." Li Gang's eyes were full of surprise, "If Your Majesty can really say it, I am willing to kowtow to His Majesty to make amends!"

Hearing that Li Gang actually made a bet like kowtow to apologize, the corners of Li Shimin's mouth curled up with a strange arc.

On weekdays, when Li Gang saw Li Shimin, the most he could do was to bow his hands and salute. After all, with his age, status, and Li Shimin's approval, there was no one in the world who could make Li Gang kneel down.

But now that he made such a bet, Li Shimin decided to show Li Gang some color.

"Okay, then it's settled!" Li Shimin smiled and stretched out his hand, and Li Junxian who was at the side immediately came over with a blank pen and paper.

"Then look, four thousand 650 and seven 760, right!"

"This topic can be calculated directly by column formula, that is, four thousand 650 seven, multiplied by 760."

"Six seven 42, five six thirty, six six 36, four six 24, seven seven 49, five seven 35, six seven 42, four seven 28, add up and down, calculate like this!"

"The final result is three hundred and one hundred and twenty thousand and one hundred and ninety-one. Mr. Li Gang, have you figured it out?"

When Li Shimin was talking and calculating, Li Gang was also calculating, but when he saw Li Shimin figured out the result three times and two times, and he only calculated four thousand 760, Li Gang was completely stupid.

"This, how is this possible?" Li Gang's face was full of uneasiness and perception. He speeded up and used his cumbersome calculation method. It took him a cup of tea to calculate it easily, but he felt that there was a problem.

So Li Gang re-checked the calculation twice, it took half an hour before and after, and finally calculated the result, and then compared it with the number calculated by Li Shimin, Li Gang's eyes froze for a while.

The result was exactly the same, but Li Shimin didn't even spend an incense stick of time before and after, but Li Gang himself spent half an hour, so he was so opinionated.

Li Tai, who witnessed the whole process, opened his mouth wide at the moment, with a look of disbelief on his face.

He thought that his father was talking big, but he didn't expect to win Li Gang for his father.

Plop!Li Gang did what he said, and he knelt down to Li Shimin directly. He couldn't stop him, and kowtowed several times in succession.

"Your Majesty, this old minister is willing to gamble and admit defeat, but I beg Your Majesty to do one thing..." Li Gang kowtowed and begged Li Shimin.

Li Shimin saw that Li Gang's head was bruised, and quickly helped the old man up, "Sir, please say something, don't be like this, just now I was just joking, don't take it seriously."

"I will do what I said!" Li Gang stubbornly shook his head, and then said: "I implore Your Majesty, to pass on the calculation method just now to this old man. For this, I am willing to pay any price, please Your Majesty!"

As a master of counting, Li Gang is very clear that the counting method Li Shimin just used is more than one grade better than his own.

At his current age, he might not be able to reach Li Shimin's level just now if he survived another ten or twenty years.

So since Li Shimin knew this method of counting, Li Gang naturally wanted to learn it from Li Shimin at all costs.

"It's a trivial matter, I'll pass it on to my husband." When Li Shimin heard about it, he immediately waved his hand and agreed.

Li Gang was overjoyed, and glared at Li Tai, Li Tai reacted now, and quickly relaid the white paper.

Li Shimin took the pen handed over by Li Gang himself, and said with a smug smile: "Actually, this method is very simple. If you want to do this multiplication well, you must first memorize the multiplication formula."

"Multiplication formula?" Li Gang looked surprised, and saw Li Shimin write out the ninety-nine multiplication table on the white paper.

"Sir, this is the formula for multiplication. As long as you memorize these, you can easily calculate the problem just now!"

Li Gang watched carefully. He has studied and counted for decades, and he can still understand the tricks in simple multiplication formulas. He can fully remember them in just a moment.

But after he memorized it, Li Gang's eyes were full of shock, because he found that the so-called multiplication formulas listed by Li Shimin were not only regular, but also contained almost all the tricks of multiplication and counting.

Li Tai also saw some clues at this time, and at this time, Li Shimin had already begun to teach Li Gang how to formulate...

(End of this chapter)