What is the slogan of the multiplication table?

"Nine-Nine Multiplication Songs" is also often called "Little Nine-Nine". It is a multiplication formula starting from "one one gets one" and ending with "nine nine eighty one". China used the "Nine-Nine Formula" earlier. In "Xunzi", "Guanzi", "Huainanzi", "Warring States Policy" and other books, you can find "three-nine-twenty-seven", "six-eight-forty-eight", "four-eight-thirty-two", "six Six thirty-six" and other sentences. It can be seen that as early as the Spring and Autumn Period and the Warring States Period, the "Nine-Nine Multiplication Songs" had already become popular.