We're dividing 798953 by 21 
Let's see how many times 21 fits into 798953.

Advancing to step 1:
When dividing 7 by 21, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 21

Step 2:
If we divide 79 by 21, we get 3 and a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 63 from 79, we get 16.
Bring next digit (8) of the dividend behind the 16 and repeat the process: 168 / 21

Step 3:
The number 21 fits into 168 8 times, leaving a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Subtracting 168 from 168 leaves us with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 21

Advancing to step 4:
The number 21 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 380.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 21

Going ahead to step 5:
If we divide 95 by 21, we get 4 and a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 3804.0
Subtracting 84 from 95 leaves us with 11.
Take the next digit (3) from the dividend and append it to 11, then repeat: 113 / 21

Moving on to step 6:
113 divided by 21 is 5 with a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 38045.0
If we subtract 105 from 113, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
If we divide 80 by 21, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 38045.3
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:
If we divide 170 by 21, we get 8 and a remainder of 2.
The next digit of our result is 8. 
Result so far: 38045.38
If we take 168 away from 170, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
21 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 38045.38
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.

Step 10:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 38045.3809
Subtracting 189 from 200 leaves us 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.

On to step 11:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 38045.38095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 12:
If we divide 50 by 21, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 38045.380952
Subtract 42 from 50 to get 8.
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:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 38045.3809523
If we subtract 63 from 80, we 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.

On to step 14:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 38045.38095238
Subtracting 168 from 170 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 38045.38095238 with a remainder of 2e-09.