823724 divided by 21 
Let's see how many times 21 fits into 823724.

On to step 1:
8 divided by 21 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 21

Going ahead to step 2:
The number 21 fits into 82 3 times, leaving a remainder of 19.
The next digit of our result is 3. 
Result so far: 3.0
If we take 63 away from 82, we end up with 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 21

Let's proceed to step 3:
If we divide 193 by 21, we get 9 and a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 39.0
If we subtract 189 from 193, we get 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 21

Advancing to step 4:
21 goes into 47 2 times with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 392.0
Subtract 42 from 47 to get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 21

Going ahead to step 5:
The number 21 fits into 52 2 times, leaving a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 3922.0
The remainder is 10 after subtracting 42 from 52.
Bring next digit (4) of the dividend behind the 10 and repeat the process: 104 / 21

On to step 6:
21 goes into 104 4 times with a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 39224.0
The remainder is 20 after subtracting 84 from 104.
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 7:
When dividing 200 by 21, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 39224.9
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.

Going ahead to step 8:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 39224.95
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.

Step 9:
When dividing 50 by 21, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 39224.952
If we take 42 away from 50, we end up 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.

Going ahead to step 10:
If we divide 80 by 21, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 39224.9523
If we subtract 63 from 80, we 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.

Let's proceed to step 11:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The next digit of our result is 8. 
Result so far: 39224.95238
The remainder is 2 after subtracting 168 from 170.
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 12:
When dividing 20 by 21, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 39224.95238
If we subtract 0 from 20, we get 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 13:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 39224.9523809
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 14:
When dividing 110 by 21, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 39224.95238095
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.

The final result is 39224.95238095 with a remainder of 5e-09.