We look at the division of 538731 by 21 
Our goal is to divide 538731 by 21.

On to step 1:
The number 21 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 21

Step 2:
53 divided by 21 is 2 with a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 11 after subtracting 42 from 53.
Append the next digit (8) from the dividend to 11 and continue with: 118 / 21

Going ahead to step 3:
If we divide 118 by 21, we get 5 and a remainder of 13.
Write down 5 as next digit of the result. 
Result so far: 25.0
Subtracting 105 from 118 leaves us with 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 21

Going ahead to step 4:
The number 21 fits into 137 6 times, leaving a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 256.0
The remainder is 11 after subtracting 126 from 137.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 21

Moving on to step 5:
113 divided by 21 is 5 with a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 2565.0
If we subtract 105 from 113, we get 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 21

Moving on to step 6:
21 goes into 81 3 times with a remainder of 18.
Put 3 as the next digit of the answer. 
Result so far: 25653.0
Subtract 63 from 81 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
21 can be fit into 180 8 times, resulting in a remainder of 12.
The next digit of our result is 8. 
Result so far: 25653.8
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 8:
If we divide 120 by 21, we get 5 and a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 25653.85
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
21 goes into 150 7 times with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 25653.857
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 10:
21 goes into 30 1 times with a remainder of 9.
The next digit of our result is 1. 
Result so far: 25653.8571
Deduct 21 from 30 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 11:
When dividing 90 by 21, we get 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 25653.85714
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 12:
If we divide 60 by 21, we get 2 and a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 25653.857142
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 13:
The number 21 fits into 180 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 25653.8571428
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 14:
120 divided by 21 is 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 25653.85714285
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

In conclusion, the division gives 25653.85714285 with a balance of 1.5e-08.