We're dividing 988504 by 21 
Let's see how many times 21 fits into 988504.

Step 1:
21 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 21

Moving on to step 2:
21 can be fit into 98 4 times, resulting in a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 84 from 98 to get 14.
Include the next digit (8) from the dividend after 14, then repeat: 148 / 21

On to step 3:
21 can be fit into 148 7 times, resulting in a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
If we take 147 away from 148, we end up with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 21

Going ahead to step 4:
15 divided by 21 is 0 with a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 470.0
Subtract 0 from 15 to get 15.
Bring next digit (0) of the dividend behind the 15 and repeat the process: 150 / 21

Step 5:
If we divide 150 by 21, we get 7 and a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 4707.0
Deduct 147 from 150 and we're left with 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 21

Advancing to step 6:
The number 21 fits into 34 1 times, leaving a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 47071.0
If we subtract 21 from 34, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 7:
21 goes into 130 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 47071.6
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 8:
21 goes into 40 1 times with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 47071.61
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 9:
190 divided by 21 is 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 47071.619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 10:
21 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 47071.619
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 11:
When dividing 100 by 21, we get 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 47071.61904
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 12:
160 divided by 21 is 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 47071.619047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 13:
21 goes into 130 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 47071.6190476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 14:
If we divide 40 by 21, we get 1 and a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 47071.61904761
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final result is 47071.61904761 with a remainder of 1.9e-08.