Let's divide 72912296 by 21
We want to divide 72912296 by 21.

Advancing to step 1:
When dividing 7 by 21, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 21

Let's proceed to step 2:
21 can be fit into 72 3 times, resulting in a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 63 from 72, we get 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 21

Let's proceed to step 3:
21 goes into 99 4 times with a remainder of 15.
Write down 4 as next digit of the result. 
Result so far: 34.0
The remainder is 15 after subtracting 84 from 99.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 21

Going ahead to step 4:
21 can be fit into 151 7 times, resulting in a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 347.0
If we subtract 147 from 151, we get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 21

Advancing to step 5:
21 can be fit into 42 2 times, resulting in a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 3472.0
Subtract 42 from 42 to get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 21

Step 6:
The number 21 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 34720.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 21

On to step 7:
If we divide 29 by 21, we get 1 and a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 347201.0
Subtract 21 from 29 to get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 21

Let's proceed to step 8:
If we divide 86 by 21, we get 4 and a remainder of 2.
The next digit of our result is 4. 
Result so far: 3472014.0
Subtract 84 from 86 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 9:
21 goes into 20 0 times with a remainder of 20.
The next digit of our result is 0. 
Result so far: 3472014.0
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 10:
200 divided by 21 is 9 with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 3472014.09
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 11:
21 goes into 110 5 times with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 3472014.095
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 12:
When dividing 50 by 21, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 3472014.0952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 13:
The number 21 fits into 80 3 times, leaving a remainder of 17.
The next digit of our result is 3. 
Result so far: 3472014.09523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 14:
If we divide 170 by 21, we get 8 and a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 3472014.095238
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 15:
20 divided by 21 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 3472014.095238
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 16:
When dividing 200 by 21, we get 9 with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 3472014.09523809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The quotient of the division is 3472014.09523809, and the remainder is 1.1e-08.