1, with vertical columns, is mantissa alignment of factors.

2. When the column is vertical, for the convenience of calculation, factors with more digits are generally put on it.

3. If there are integer 10000 factors, the first digits of the two factors from the right are non-zero-aligned, and then the corresponding number of zeros is filled in the number.

If there is 0 at the end of the number, count the decimal point first, and then go to 0.

5. If there are not enough decimal places, you need to add 0 in front.

Extended data:

Vertical calculation rule

1, multiplication

The i-th bit of one number is multiplied by the j-th bit of another number.

It should be added to i+j- 1 bit of the product.

Step 2 separate

For example, 42 divided by 7.

On a scale of 4 [from high to low]. When calculating the division vertically, start from most significant bit, such as: 42 from most significant bit 4; If it is not divisible, such as: 4 is not divisible by 7, then use the highest bit and the next bit to synthesize a number to be divisible until it can be divisible by the divisor; For example, if 4 is not divisible by 7 in 42, then 4 and 2 are combined into a number. If 42 is divided by 7, the quotient is 6.