We look at the division of 988752 by 21 
We're looking to find how many times 21 goes into 988752.

Moving on to step 1:
The number 21 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 21

Going ahead to step 2:
The number 21 fits into 98 4 times, leaving a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 84 from 98 and we're left with 14.
Take the next digit (8) from the dividend and append it to 14, then repeat: 148 / 21

On to step 3:
21 goes into 148 7 times with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
Deduct 147 from 148 and we're left with 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 21

Step 4:
When dividing 17 by 21, we get 0 with a remainder of 17.
Use 0 as the next digit of our solution. 
Result so far: 470.0
If we take 0 away from 17, we end up with 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 21

Step 5:
21 can be fit into 175 8 times, resulting in a remainder of 7.
The next digit of our result is 8. 
Result so far: 4708.0
Subtracting 168 from 175 leaves us with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 21

Going ahead to step 6:
21 goes into 72 3 times with a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 47083.0
The remainder is 9 after subtracting 63 from 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
When dividing 90 by 21, we get 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 47083.4
The remainder is 6 after subtracting 84 from 90.
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 8:
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: 47083.42
If we subtract 42 from 60, we 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.

Advancing to step 9:
When dividing 180 by 21, we get 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 47083.428
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.

Step 10:
120 divided by 21 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 47083.4285
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.

On to step 11:
The number 21 fits into 150 7 times, leaving a remainder of 3.
The next digit of our result is 7. 
Result so far: 47083.42857
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.

Step 12:
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: 47083.428571
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.

Step 13:
When dividing 90 by 21, we get 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 47083.4285714
Deduct 84 from 90 and we're left 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.

Moving on to step 14:
When dividing 60 by 21, we get 2 with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 47083.42857142
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.

The final outcome is 47083.42857142, with a leftover of 1.8e-08.