We divide 21099 by 23
Let's see how many times 23 fits into 21099.

Moving on to step 1:
23 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 23

Step 2:
When dividing 21 by 23, we get 0 with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Grab the next digit (0) from the dividend, add it to 21, then carry on: 210 / 23

Step 3:
If we divide 210 by 23, we get 9 and a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 207 from 210 to get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 23

Advancing to step 4:
If we divide 39 by 23, we get 1 and a remainder of 16.
The next digit of our result is 1. 
Result so far: 91.0
Deduct 23 from 39 and we're left with 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 23

Step 5:
The number 23 fits into 169 7 times, leaving a remainder of 8.
The next digit of our result is 7. 
Result so far: 917.0
If we subtract 161 from 169, we 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.

Let's proceed to step 6:
If we divide 80 by 23, we get 3 and a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 917.3
Subtracting 69 from 80 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.

On to step 7:
23 can be fit into 110 4 times, resulting in a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 917.34
Subtract 92 from 110 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 8:
180 divided by 23 is 7 with a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 917.347
If we subtract 161 from 180, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 9:
If we divide 190 by 23, we get 8 and a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 917.3478
Subtract 184 from 190 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 10:
23 can be fit into 60 2 times, resulting in a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 917.34782
Subtract 46 from 60 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 11:
If we divide 140 by 23, we get 6 and a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 917.347826
The remainder is 2 after subtracting 138 from 140.
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 12:
The number 23 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 917.347826
Subtract 0 from 20 to 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.

On to step 13:
If we divide 200 by 23, we get 8 and a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 917.34782608
Subtract 184 from 200 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 917.34782608 with a remainder of 1.6e-08.