We divide 21088239 by 123
Let's see how many times 123 fits into 21088239.

Advancing to step 1:
The number 123 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 123

Step 2:
The number 123 fits into 21 0 times, leaving a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Fetch the next digit (0) from the dividend, attach it to 21 and continue: 210 / 123

Moving on to step 3:
When dividing 210 by 123, we get 1 with a remainder of 87.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 87 after subtracting 123 from 210.
Take the next digit (8) from the dividend and append it to 87, then repeat: 878 / 123

Step 4:
If we divide 878 by 123, we get 7 and a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtract 861 from 878 to get 17.
Append the next digit (8) from the dividend to 17 and continue with: 178 / 123

Let's proceed to step 5:
When dividing 178 by 123, we get 1 with a remainder of 55.
The next digit of our result is 1. 
Result so far: 171.0
The remainder is 55 after subtracting 123 from 178.
Grab the next digit (2) from the dividend, add it to 55, then carry on: 552 / 123

Advancing to step 6:
If we divide 552 by 123, we get 4 and a remainder of 60.
Put 4 as the next digit of the answer. 
Result so far: 1714.0
If we take 492 away from 552, we end up with 60.
Fetch the next digit (3) from the dividend, attach it to 60 and continue: 603 / 123

Let's proceed to step 7:
If we divide 603 by 123, we get 4 and a remainder of 111.
The number 4 becomes the next digit in our result. 
Result so far: 17144.0
Subtract 492 from 603 to get 111.
Fetch the next digit (9) from the dividend, attach it to 111 and continue: 1119 / 123

Let's proceed to step 8:
123 goes into 1119 9 times with a remainder of 12.
The next digit of our result is 9. 
Result so far: 171449.0
Subtracting 1107 from 1119 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
120 divided by 123 is 0 with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 171449.0
Subtract 0 from 120 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 10:
The number 123 fits into 1200 9 times, leaving a remainder of 93.
Use 9 as the next digit of our solution. 
Result so far: 171449.09
Subtracting 1107 from 1200 leaves us with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Moving on to step 11:
When dividing 930 by 123, we get 7 with a remainder of 69.
Write down 7 as next digit of the result. 
Result so far: 171449.097
Subtract 861 from 930 to get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Advancing to step 12:
123 goes into 690 5 times with a remainder of 75.
Put 5 as the next digit of the answer. 
Result so far: 171449.0975
Deduct 615 from 690 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 13:
If we divide 750 by 123, we get 6 and a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 171449.09756
If we subtract 738 from 750, 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.

Step 14:
123 goes into 120 0 times with a remainder of 120.
The number 0 becomes the next digit in our result. 
Result so far: 171449.09756
If we subtract 0 from 120, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 15:
123 can be fit into 1200 9 times, resulting in a remainder of 93.
Use 9 as the next digit of our solution. 
Result so far: 171449.0975609
Subtracting 1107 from 1200 leaves us with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Advancing to step 16:
123 goes into 930 7 times with a remainder of 69.
Use 7 as the next digit of our solution. 
Result so far: 171449.09756097
Subtracting 861 from 930 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

The final result is 171449.09756097 with a remainder of 6.9e-08.