40921 ÷ 23 
We want to divide 40921 by 23.

Going ahead to step 1:
When dividing 4 by 23, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 23

Step 2:
40 divided by 23 is 1 with a remainder of 17.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 23 from 40, we get 17.
Fetch the next digit (9) from the dividend, attach it to 17 and continue: 179 / 23

Let's proceed to step 3:
If we divide 179 by 23, we get 7 and a remainder of 18.
The next digit of our result is 7. 
Result so far: 17.0
Subtract 161 from 179 to get 18.
Fetch the next digit (2) from the dividend, attach it to 18 and continue: 182 / 23

Step 4:
23 goes into 182 7 times with a remainder of 21.
Put 7 as the next digit of the answer. 
Result so far: 177.0
Deduct 161 from 182 and we're left with 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 23

Step 5:
The number 23 fits into 211 9 times, leaving a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 1779.0
Subtracting 207 from 211 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 6:
23 goes into 40 1 times with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1779.1
Deduct 23 from 40 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.

On to step 7:
170 divided by 23 is 7 with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 1779.17
If we take 161 away from 170, we end up 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.

Moving on to step 8:
The number 23 fits into 90 3 times, leaving a remainder of 21.
The next digit of our result is 3. 
Result so far: 1779.173
The remainder is 21 after subtracting 69 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 9:
When dividing 210 by 23, we get 9 with a remainder of 3.
The next digit of our result is 9. 
Result so far: 1779.1739
Subtracting 207 from 210 leaves us with 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 10:
The number 23 fits into 30 1 times, leaving a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 1779.17391
If we subtract 23 from 30, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 11:
When dividing 70 by 23, we get 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 1779.173913
If we subtract 69 from 70, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 12:
23 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 1779.173913
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 13:
If we divide 100 by 23, we get 4 and a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 1779.17391304
Deduct 92 from 100 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.

The final outcome is 1779.17391304, with a leftover of 8e-09.