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math.NT2023
The Plum-Blossom Wedge Product Method for Multiplication and Division of Multi-digit Integers
Yongwen Zhu
For two integers and , the plum-blossom product of and is defined as the ones of the usual product of and if the ones is less than or equal to , or otherw…
math.NT2021
A Multiplication Formula and Its Application
Yongwen Zhu
This article presents a vertical multiplication formula for calculating the multiplication of any two multi-digit integers, which may be not only used to design the multiplier but…