We look at the division of 828761 by 21 
We want to divide 828761 by 21.

Let's proceed to step 1:
If we divide 8 by 21, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 21

On to step 2:
21 can be fit into 82 3 times, resulting in a remainder of 19.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 19 after subtracting 63 from 82.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 21

Step 3:
The number 21 fits into 198 9 times, leaving a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Subtracting 189 from 198 leaves us with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 21

On to step 4:
21 can be fit into 97 4 times, resulting in a remainder of 13.
The number 4 becomes the next digit in our result. 
Result so far: 394.0
Deduct 84 from 97 and we're left with 13.
Include the next digit (6) from the dividend after 13, then repeat: 136 / 21

Let's proceed to step 5:
21 goes into 136 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 3946.0
If we take 126 away from 136, we end up with 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 21

Step 6:
21 can be fit into 101 4 times, resulting in a remainder of 17.
Put 4 as the next digit of the answer. 
Result so far: 39464.0
Deduct 84 from 101 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.

Let's proceed to step 7:
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: 39464.8
Deduct 168 from 170 and we're left 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.

Let's proceed to step 8:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 39464.8
Deduct 0 from 20 and we're left 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.

Advancing to step 9:
21 goes into 200 9 times with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 39464.809
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.

Advancing to step 10:
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: 39464.8095
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.

Step 11:
If we divide 50 by 21, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 39464.80952
Deduct 42 from 50 and we're left 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.

Let's proceed to step 12:
80 divided by 21 is 3 with a remainder of 17.
The next digit of our result is 3. 
Result so far: 39464.809523
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.

Step 13:
21 goes into 170 8 times with a remainder of 2.
The next digit of our result is 8. 
Result so far: 39464.8095238
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.

Let's proceed to step 14:
If we divide 20 by 21, we get 0 and a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 39464.8095238
Deduct 0 from 20 and we're left 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.

After the division, we end up with 39464.8095238 and a remainder of 2e-08.