We divide 790721 by 21
Our goal is to divide 790721 by 21.

On to step 1:
If we divide 7 by 21, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 21

Moving on to step 2:
21 can be fit into 79 3 times, resulting in a remainder of 16.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 16 after subtracting 63 from 79.
Bring next digit (0) of the dividend behind the 16 and repeat the process: 160 / 21

Going ahead to step 3:
21 goes into 160 7 times with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 37.0
The remainder is 13 after subtracting 147 from 160.
Append the next digit (7) from the dividend to 13 and continue with: 137 / 21

Going ahead to step 4:
137 divided by 21 is 6 with a remainder of 11.
Use 6 as the next digit of our solution. 
Result so far: 376.0
The remainder is 11 after subtracting 126 from 137.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 21

Going ahead to step 5:
21 goes into 112 5 times with a remainder of 7.
Write down 5 as next digit of the result. 
Result so far: 3765.0
Subtract 105 from 112 to get 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 21

Let's proceed to step 6:
71 divided by 21 is 3 with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 37653.0
Subtracting 63 from 71 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
21 can be fit into 80 3 times, resulting in a remainder of 17.
The next digit of our result is 3. 
Result so far: 37653.3
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 8:
170 divided by 21 is 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 37653.38
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
21 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 37653.38
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
21 goes into 200 9 times with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 37653.3809
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 11:
110 divided by 21 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 37653.38095
Subtracting 105 from 110 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 12:
When dividing 50 by 21, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 37653.380952
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.

Moving on to step 13:
21 can be fit into 80 3 times, resulting in a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 37653.3809523
Deduct 63 from 80 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 14:
21 can be fit into 170 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 37653.38095238
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.

After the division, we end up with 37653.38095238 and a remainder of 2e-09.