We're dividing 819935 by 21 
We're looking to find how many times 21 goes into 819935.

On to step 1:
21 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 21

Advancing to step 2:
21 goes into 81 3 times with a remainder of 18.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 63 from 81 leaves us with 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 21

Moving on to step 3:
The number 21 fits into 189 9 times, leaving a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 39.0
Subtracting 189 from 189 leaves us with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 21

Let's proceed to step 4:
21 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 390.0
Subtract 0 from 9 to get 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 21

Step 5:
The number 21 fits into 93 4 times, leaving a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 3904.0
Subtract 84 from 93 to get 9.
Append the next digit (5) from the dividend to 9 and continue with: 95 / 21

Advancing to step 6:
21 can be fit into 95 4 times, resulting in a remainder of 11.
The next digit of our result is 4. 
Result so far: 39044.0
Subtracting 84 from 95 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.

Step 7:
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: 39044.5
Deduct 105 from 110 and we're left 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.

Let's proceed to step 8:
21 goes into 50 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 39044.52
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:
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: 39044.523
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.

Going ahead to step 10:
170 divided by 21 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 39044.5238
If we subtract 168 from 170, we 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 11:
20 divided by 21 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 39044.5238
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.

Step 12:
21 goes into 200 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 39044.523809
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 13:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 39044.5238095
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.

Advancing to step 14:
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: 39044.52380952
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.

In conclusion, the division gives 39044.52380952 with a balance of 8e-09.