We look at the division of 21489350 by 972 
Let's see how many times 972 fits into 21489350.

Going ahead to step 1:
The number 972 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 972

Step 2:
The number 972 fits into 21 0 times, leaving a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Take the next digit (4) from the dividend and append it to 21, then repeat: 214 / 972

On to step 3:
214 divided by 972 is 0 with a remainder of 214.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 214 and we're left with 214.
Fetch the next digit (8) from the dividend, attach it to 214 and continue: 2148 / 972

Step 4:
When dividing 2148 by 972, we get 2 with a remainder of 204.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 1944 from 2148 to get 204.
Append the next digit (9) from the dividend to 204 and continue with: 2049 / 972

On to step 5:
When dividing 2049 by 972, we get 2 with a remainder of 105.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
The remainder is 105 after subtracting 1944 from 2049.
Include the next digit (3) from the dividend after 105, then repeat: 1053 / 972

Let's proceed to step 6:
1053 divided by 972 is 1 with a remainder of 81.
Put 1 as the next digit of the answer. 
Result so far: 221.0
The remainder is 81 after subtracting 972 from 1053.
Bring next digit (5) of the dividend behind the 81 and repeat the process: 815 / 972

On to step 7:
When dividing 815 by 972, we get 0 with a remainder of 815.
The number 0 becomes the next digit in our result. 
Result so far: 2210.0
If we take 0 away from 815, we end up with 815.
Bring next digit (0) of the dividend behind the 815 and repeat the process: 8150 / 972

Moving on to step 8:
If we divide 8150 by 972, we get 8 and a remainder of 374.
Record the quotient 8 as the next digit in the result. 
Result so far: 22108.0
If we subtract 7776 from 8150, we get 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

Advancing to step 9:
3740 divided by 972 is 3 with a remainder of 824.
Record the quotient 3 as the next digit in the result. 
Result so far: 22108.3
Deduct 2916 from 3740 and we're left with 824.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8240, and continue the process.

Let's proceed to step 10:
When dividing 8240 by 972, we get 8 with a remainder of 464.
The next digit of our result is 8. 
Result so far: 22108.38
Subtract 7776 from 8240 to get 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Step 11:
The number 972 fits into 4640 4 times, leaving a remainder of 752.
Use 4 as the next digit of our solution. 
Result so far: 22108.384
The remainder is 752 after subtracting 3888 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7520, and continue the process.

Advancing to step 12:
972 can be fit into 7520 7 times, resulting in a remainder of 716.
The number 7 becomes the next digit in our result. 
Result so far: 22108.3847
The remainder is 716 after subtracting 6804 from 7520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7160, and continue the process.

Let's proceed to step 13:
When dividing 7160 by 972, we get 7 with a remainder of 356.
The number 7 becomes the next digit in our result. 
Result so far: 22108.38477
If we take 6804 away from 7160, we end up with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

The quotient of the division is 22108.38477, and the remainder is 0.000356.