We look at the division of 96889579 by 21 
Our goal is to divide 96889579 by 21.

Let's proceed to step 1:
21 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 21

Moving on to step 2:
The number 21 fits into 96 4 times, leaving a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 84 from 96, we get 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 21

Step 3:
If we divide 128 by 21, we get 6 and a remainder of 2.
The next digit of our result is 6. 
Result so far: 46.0
If we take 126 away from 128, we end up with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 21

Advancing to step 4:
21 can be fit into 28 1 times, resulting in a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 461.0
Subtract 21 from 28 to get 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 21

On to step 5:
21 goes into 79 3 times with a remainder of 16.
Put 3 as the next digit of the answer. 
Result so far: 4613.0
Subtracting 63 from 79 leaves us with 16.
Take the next digit (5) from the dividend and append it to 16, then repeat: 165 / 21

Advancing to step 6:
When dividing 165 by 21, we get 7 with a remainder of 18.
Use 7 as the next digit of our solution. 
Result so far: 46137.0
If we take 147 away from 165, we end up with 18.
Grab the next digit (7) from the dividend, add it to 18, then carry on: 187 / 21

On to step 7:
If we divide 187 by 21, we get 8 and a remainder of 19.
The next digit of our result is 8. 
Result so far: 461378.0
If we take 168 away from 187, we end up with 19.
Take the next digit (9) from the dividend and append it to 19, then repeat: 199 / 21

Going ahead to step 8:
The number 21 fits into 199 9 times, leaving a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 4613789.0
If we take 189 away from 199, 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 9:
When dividing 100 by 21, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 4613789.4
Subtracting 84 from 100 leaves us 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.

Moving on to step 10:
21 can be fit into 160 7 times, resulting in a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 4613789.47
Subtract 147 from 160 to 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.

On to step 11:
21 goes into 130 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 4613789.476
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.

On to step 12:
If we divide 40 by 21, we get 1 and a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 4613789.4761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 13:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 4613789.47619
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 14:
21 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 4613789.47619
Deduct 0 from 10 and we're left 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.

Advancing to step 15:
The number 21 fits into 100 4 times, leaving a remainder of 16.
The next digit of our result is 4. 
Result so far: 4613789.4761904
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.

Step 16:
21 can be fit into 160 7 times, resulting in a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 4613789.47619047
If we take 147 away from 160, we end up 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.

Our division results in 4613789.47619047 with a remaining 1.3e-08.