311572 divided by 21 
We're looking to find how many times 21 goes into 311572.

On to step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 21

On to step 2:
21 can be fit into 31 1 times, resulting in a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 10 after subtracting 21 from 31.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 21

Moving on to step 3:
If we divide 101 by 21, we get 4 and a remainder of 17.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
The remainder is 17 after subtracting 84 from 101.
Bring next digit (5) of the dividend behind the 17 and repeat the process: 175 / 21

Let's proceed to step 4:
The number 21 fits into 175 8 times, leaving a remainder of 7.
Write down 8 as next digit of the result. 
Result so far: 148.0
Subtracting 168 from 175 leaves us with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 21

Going ahead to step 5:
77 divided by 21 is 3 with a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 1483.0
Deduct 63 from 77 and we're left with 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 21

Step 6:
21 can be fit into 142 6 times, resulting in a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 14836.0
If we take 126 away from 142, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 14836.7
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 8:
21 can be fit into 130 6 times, resulting in a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 14836.76
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
21 goes into 40 1 times with a remainder of 19.
The next digit of our result is 1. 
Result so far: 14836.761
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 10:
21 goes into 190 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 14836.7619
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 11:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 14836.7619
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
21 goes into 100 4 times with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 14836.761904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 13:
160 divided by 21 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 14836.7619047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 14:
If we divide 130 by 21, we get 6 and a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 14836.76190476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 14836.76190476 with a remainder of 4e-09.