Let's divide 529437 by 21
Our goal is to divide 529437 by 21.

Going ahead to step 1:
When dividing 5 by 21, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 21

Advancing to step 2:
21 can be fit into 52 2 times, resulting in a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 10 after subtracting 42 from 52.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 21

On to step 3:
If we divide 109 by 21, we get 5 and a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
If we take 105 away from 109, we end up with 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 21

Going ahead to step 4:
44 divided by 21 is 2 with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 252.0
The remainder is 2 after subtracting 42 from 44.
Take the next digit (3) from the dividend and append it to 2, then repeat: 23 / 21

Let's proceed to step 5:
When dividing 23 by 21, we get 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 2521.0
The remainder is 2 after subtracting 21 from 23.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 21

Step 6:
If we divide 27 by 21, we get 1 and a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 25211.0
Subtract 21 from 27 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
21 goes into 60 2 times with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 25211.2
Subtract 42 from 60 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.

Step 8:
If we divide 180 by 21, we get 8 and a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 25211.28
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
21 goes into 120 5 times with a remainder of 15.
The next digit of our result is 5. 
Result so far: 25211.285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 10:
150 divided by 21 is 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 25211.2857
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 11:
If we divide 30 by 21, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 25211.28571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 12:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 25211.285714
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 13:
21 goes into 60 2 times with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 25211.2857142
If we take 42 away from 60, we end up 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.

Going ahead to step 14:
21 goes into 180 8 times with a remainder of 12.
The next digit of our result is 8. 
Result so far: 25211.28571428
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.

The final result is 25211.28571428 with a remainder of 1.2e-08.