We look at the division of 609532 by 21 
Let's see how many times 21 fits into 609532.

Going ahead to step 1:
The number 21 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 21

Going ahead to step 2:
21 can be fit into 60 2 times, resulting in a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 42 from 60 leaves us with 18.
Fetch the next digit (9) from the dividend, attach it to 18 and continue: 189 / 21

On to step 3:
If we divide 189 by 21, we get 9 and a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 29.0
Deduct 189 from 189 and we're left with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 21

Moving on to step 4:
When dividing 5 by 21, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 290.0
Subtract 0 from 5 to get 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 21

Going ahead to step 5:
21 goes into 53 2 times with a remainder of 11.
Put 2 as the next digit of the answer. 
Result so far: 2902.0
Deduct 42 from 53 and we're left with 11.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 21

Going ahead to step 6:
21 can be fit into 112 5 times, resulting in a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 29025.0
The remainder is 7 after subtracting 105 from 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
21 goes into 70 3 times with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 29025.3
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 8:
70 divided by 21 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 29025.33
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 29025.33 with a remaining 0.007.