We look at the division of 816482 by 21 
We're looking to find how many times 21 goes into 816482.

Advancing to step 1:
If we divide 8 by 21, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 21

Advancing to step 2:
When dividing 81 by 21, we get 3 with a remainder of 18.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 18 after subtracting 63 from 81.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 21

Let's proceed to step 3:
186 divided by 21 is 8 with a remainder of 18.
The next digit of our result is 8. 
Result so far: 38.0
The remainder is 18 after subtracting 168 from 186.
Fetch the next digit (4) from the dividend, attach it to 18 and continue: 184 / 21

Step 4:
When dividing 184 by 21, we get 8 with a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 388.0
Subtracting 168 from 184 leaves us with 16.
Fetch the next digit (8) from the dividend, attach it to 16 and continue: 168 / 21

On to step 5:
If we divide 168 by 21, we get 8 and a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 3888.0
If we take 168 away from 168, we end up with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 21

Step 6:
2 divided by 21 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 38880.0
Subtract 0 from 2 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.

Going ahead to step 7:
When dividing 20 by 21, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 38880.0
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.

On to step 8:
The number 21 fits into 200 9 times, leaving a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 38880.09
Subtract 189 from 200 to 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 9:
If we divide 110 by 21, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 38880.095
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.

Advancing to step 10:
If we divide 50 by 21, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 38880.0952
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.

On to step 11:
21 goes into 80 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 38880.09523
If we take 63 away from 80, we end up 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 12:
21 can be fit into 170 8 times, resulting in a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 38880.095238
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.

Advancing to step 13:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 38880.095238
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.

Moving on to step 14:
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: 38880.09523809
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.

In conclusion, the division gives 38880.09523809 with a balance of 1.1e-08.