The answer process is as follows:
(1) Step 1, write the dividend, divisor and divisor according to the calculation rules of vertical division, as shown in the following figure:
(2) The second step, starting from the high order of the dividend, first look at how many digits there are in the dividend, and then try to divide the first few digits of the dividend by the divisor. If it is smaller than the divisor, divide it by one digit as much as possible; Write the quotient except the dividend on the dividend. 6 is not enough to divide by 2 1. You need to see the next digit of 6, 68, divided by 2 1. You can write 3 on bit 68, as follows:
(3) Then multiply 3 by 2 1 and write the multiplication result under the corresponding number, as shown in the following figure:
(4) For the difference, use 68-63, and the result is 3, which is reserved as the remainder, as shown in the following figure: