We're dividing 826731 by 21 
We're looking to find how many times 21 goes into 826731.

Advancing to step 1:
8 divided by 21 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 21

Going ahead to step 2:
When dividing 82 by 21, we get 3 with a remainder of 19.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 63 from 82, we get 19.
Take the next digit (6) from the dividend and append it to 19, then repeat: 196 / 21

On to step 3:
When dividing 196 by 21, we get 9 with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
If we take 189 away from 196, we end up with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 21

Step 4:
77 divided by 21 is 3 with a remainder of 14.
The next digit of our result is 3. 
Result so far: 393.0
Subtracting 63 from 77 leaves us with 14.
Include the next digit (3) from the dividend after 14, then repeat: 143 / 21

On to step 5:
When dividing 143 by 21, we get 6 with a remainder of 17.
The number 6 becomes the next digit in our result. 
Result so far: 3936.0
Subtract 126 from 143 to get 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 21

Going ahead to step 6:
The number 21 fits into 171 8 times, leaving a remainder of 3.
The next digit of our result is 8. 
Result so far: 39368.0
Subtract 168 from 171 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 39368.1
If we subtract 21 from 30, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 8:
When dividing 90 by 21, we get 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 39368.14
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 9:
The number 21 fits into 60 2 times, leaving a remainder of 18.
The next digit of our result is 2. 
Result so far: 39368.142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 10:
21 goes into 180 8 times with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 39368.1428
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 11:
120 divided by 21 is 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 39368.14285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 12:
21 goes into 150 7 times with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 39368.142857
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 13:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 39368.1428571
Deduct 21 from 30 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 14:
When dividing 90 by 21, we get 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 39368.14285714
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 39368.14285714, with a leftover of 6e-09.