We divide 536634 by 21
Let's see how many times 21 fits into 536634.

Going ahead to step 1:
5 divided by 21 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 21

Step 2:
53 divided by 21 is 2 with a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 42 away from 53, we end up with 11.
Bring next digit (6) of the dividend behind the 11 and repeat the process: 116 / 21

Advancing to step 3:
When dividing 116 by 21, we get 5 with a remainder of 11.
Put 5 as the next digit of the answer. 
Result so far: 25.0
The remainder is 11 after subtracting 105 from 116.
Grab the next digit (6) from the dividend, add it to 11, then carry on: 116 / 21

Moving on to step 4:
The number 21 fits into 116 5 times, leaving a remainder of 11.
Record the quotient 5 as the next digit in the result. 
Result so far: 255.0
Subtracting 105 from 116 leaves us with 11.
Include the next digit (3) from the dividend after 11, then repeat: 113 / 21

Going ahead to step 5:
If we divide 113 by 21, we get 5 and a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 2555.0
The remainder is 8 after subtracting 105 from 113.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 21

Moving on to step 6:
21 goes into 84 4 times with a remainder of 0.
The next digit of our result is 4. 
Result so far: 25554.0
If we subtract 84 from 84, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
0 divided by 21 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 25554.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
21 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 25554.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 25554.0 with a remainder of 0.0.