For example, the vertical calculation of 679-324- 188 is:
Extended data:
Vertical calculation method
Addition: the same number is aligned. If the sum exceeds 10, proceed to 1. (The numbers should be aligned. )
Subtraction: Same number alignment. If it is not enough, borrow 1 from the last digit as 10. For example:
Multiplication: the 1 bit of one number is multiplied by the 1 bit of another number and added to the i+j- 1 bit of the product.
Division: When calculating division vertically, start from most significant bit. If it is not divisible, then most significant bit and the next digit are combined into a number for division until the divisor can be divided.