Challenge (3)

"Using this method, you can reduce the calculation by half, and then get the same sum for each pair. Then, you use multiplication to quickly calculate and get the result."

"Right?" Lin Xiaoyue looked at the Sixth Princess.

This was also an algorithm that she had taught Liang Chengcai when she was teaching him multiplication.

At that time, she thought that there was no multiplication in this world. Later on, when her business expanded and she came into contact with the accountant, she realized that multiplication and division actually existed in this world.

However, there were not many people who knew about it, and even fewer people could use the multiplication table with ease.

Yes, this world also had a multiplication table. It was just that the recitation method wasn't as concise as the 21st century.