Write the quotient on the number except the dividend. If the divisor is not enough, put the quotient on this number.
The remainder of each division must be less than the divisor, put the digits of the dividend in the right of the remainder, and then continue the division.
For example, 42 divided by 7:
42 is divided from the first ten digits of 4, and 4 cannot be divided by 7. Then divide by combining the first ten digits with the last one, that is, combine 4 and 2 into a number. Divide 42 by 7, and the quotient is 6. Then 42÷7=6.
For example, 42 1 divided by 7:
42 1 is divided by 4 from the highest bit of 4, and 4 cannot be divided by 7, so the highest bit and the next bit are combined into a number to divide, that is, 4 and 2 are combined into a number, and 42 is divided by 7, and the quotient is 6. And 1 in the unit is not divisible by 7, then the quotient in the unit is 0 and the remainder is 1, then 42 1 ÷ 7 = 60... 1.