We're dividing 813152 by 21 
We want to divide 813152 by 21.

Let's proceed to step 1:
The number 21 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 21

Going ahead to step 2:
81 divided by 21 is 3 with a remainder of 18.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 63 from 81 and we're left with 18.
Append the next digit (3) from the dividend to 18 and continue with: 183 / 21

Step 3:
If we divide 183 by 21, we get 8 and a remainder of 15.
The next digit of our result is 8. 
Result so far: 38.0
If we subtract 168 from 183, we get 15.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 21

Going ahead to step 4:
21 goes into 151 7 times with a remainder of 4.
The next digit of our result is 7. 
Result so far: 387.0
The remainder is 4 after subtracting 147 from 151.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 21

Going ahead to step 5:
45 divided by 21 is 2 with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 3872.0
The remainder is 3 after subtracting 42 from 45.
Append the next digit (2) from the dividend to 3 and continue with: 32 / 21

Let's proceed to step 6:
When dividing 32 by 21, we get 1 with a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 38721.0
Subtracting 21 from 32 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.

Advancing to step 7:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 38721.5
If we subtract 105 from 110, we 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.

Going ahead to step 8:
21 can be fit into 50 2 times, resulting in a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 38721.52
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.

Advancing to step 9:
When dividing 80 by 21, we get 3 with a remainder of 17.
The next digit of our result is 3. 
Result so far: 38721.523
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.

Advancing to step 10:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 38721.5238
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 11:
20 divided by 21 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 38721.5238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 12:
200 divided by 21 is 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 38721.523809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 13:
If we divide 110 by 21, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 38721.5238095
If we take 105 away from 110, we end up 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.

Going ahead to step 14:
If we divide 50 by 21, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 38721.52380952
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.

Our division results in 38721.52380952 with a remaining 8e-09.