We look at the division of 21209307 by 988 
We want to divide 21209307 by 988.

Moving on to step 1:
988 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 988

Moving on to step 2:
The number 988 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 988

Moving on to step 3:
988 goes into 212 0 times with a remainder of 212.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 212 after subtracting 0 from 212.
Bring next digit (0) of the dividend behind the 212 and repeat the process: 2120 / 988

Step 4:
2120 divided by 988 is 2 with a remainder of 144.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 1976 from 2120 and we're left with 144.
Fetch the next digit (9) from the dividend, attach it to 144 and continue: 1449 / 988

Moving on to step 5:
988 can be fit into 1449 1 times, resulting in a remainder of 461.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Deduct 988 from 1449 and we're left with 461.
Append the next digit (3) from the dividend to 461 and continue with: 4613 / 988

Let's proceed to step 6:
988 can be fit into 4613 4 times, resulting in a remainder of 661.
Use 4 as the next digit of our solution. 
Result so far: 214.0
If we subtract 3952 from 4613, we get 661.
Append the next digit (0) from the dividend to 661 and continue with: 6610 / 988

On to step 7:
6610 divided by 988 is 6 with a remainder of 682.
The next digit of our result is 6. 
Result so far: 2146.0
If we take 5928 away from 6610, we end up with 682.
Fetch the next digit (7) from the dividend, attach it to 682 and continue: 6827 / 988

Going ahead to step 8:
988 can be fit into 6827 6 times, resulting in a remainder of 899.
The number 6 becomes the next digit in our result. 
Result so far: 21466.0
The remainder is 899 after subtracting 5928 from 6827.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8990, and continue the process.

On to step 9:
988 can be fit into 8990 9 times, resulting in a remainder of 98.
Write down 9 as next digit of the result. 
Result so far: 21466.9
Subtracting 8892 from 8990 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Moving on to step 10:
988 goes into 980 0 times with a remainder of 980.
Use 0 as the next digit of our solution. 
Result so far: 21466.9
Subtract 0 from 980 to get 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9800, and continue the process.

Moving on to step 11:
988 goes into 9800 9 times with a remainder of 908.
Record the quotient 9 as the next digit in the result. 
Result so far: 21466.909
If we subtract 8892 from 9800, we get 908.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9080, and continue the process.

Advancing to step 12:
When dividing 9080 by 988, we get 9 with a remainder of 188.
The number 9 becomes the next digit in our result. 
Result so far: 21466.9099
Deduct 8892 from 9080 and we're left with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The quotient of the division is 21466.9099, and the remainder is 0.00188.