21713386 ÷ 123 
We want to figure out the number of times 21713386 can be divided by 123.

Going ahead to step 1:
123 goes into 2 0 times with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 123

Going ahead to step 2:
123 can be fit into 21 0 times, resulting in a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Append the next digit (7) from the dividend to 21 and continue with: 217 / 123

On to step 3:
When dividing 217 by 123, we get 1 with a remainder of 94.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 94 after subtracting 123 from 217.
Fetch the next digit (1) from the dividend, attach it to 94 and continue: 941 / 123

On to step 4:
If we divide 941 by 123, we get 7 and a remainder of 80.
Write down 7 as next digit of the result. 
Result so far: 17.0
The remainder is 80 after subtracting 861 from 941.
Bring next digit (3) of the dividend behind the 80 and repeat the process: 803 / 123

Going ahead to step 5:
123 goes into 803 6 times with a remainder of 65.
The next digit of our result is 6. 
Result so far: 176.0
If we subtract 738 from 803, we get 65.
Bring next digit (3) of the dividend behind the 65 and repeat the process: 653 / 123

Going ahead to step 6:
123 can be fit into 653 5 times, resulting in a remainder of 38.
Record the quotient 5 as the next digit in the result. 
Result so far: 1765.0
If we take 615 away from 653, we end up with 38.
Grab the next digit (8) from the dividend, add it to 38, then carry on: 388 / 123

Let's proceed to step 7:
123 goes into 388 3 times with a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 17653.0
The remainder is 19 after subtracting 369 from 388.
Take the next digit (6) from the dividend and append it to 19, then repeat: 196 / 123

Moving on to step 8:
123 can be fit into 196 1 times, resulting in a remainder of 73.
Use 1 as the next digit of our solution. 
Result so far: 176531.0
If we subtract 123 from 196, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 9:
If we divide 730 by 123, we get 5 and a remainder of 115.
Write down 5 as next digit of the result. 
Result so far: 176531.5
The remainder is 115 after subtracting 615 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Going ahead to step 10:
1150 divided by 123 is 9 with a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 176531.59
Subtracting 1107 from 1150 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 11:
If we divide 430 by 123, we get 3 and a remainder of 61.
Record the quotient 3 as the next digit in the result. 
Result so far: 176531.593
The remainder is 61 after subtracting 369 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 12:
The number 123 fits into 610 4 times, leaving a remainder of 118.
The number 4 becomes the next digit in our result. 
Result so far: 176531.5934
If we take 492 away from 610, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Advancing to step 13:
123 goes into 1180 9 times with a remainder of 73.
Write down 9 as next digit of the result. 
Result so far: 176531.59349
Subtract 1107 from 1180 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 14:
The number 123 fits into 730 5 times, leaving a remainder of 115.
The next digit of our result is 5. 
Result so far: 176531.593495
The remainder is 115 after subtracting 615 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Moving on to step 15:
If we divide 1150 by 123, we get 9 and a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 176531.5934959
If we take 1107 away from 1150, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 16:
123 can be fit into 430 3 times, resulting in a remainder of 61.
Record the quotient 3 as the next digit in the result. 
Result so far: 176531.59349593
Subtract 369 from 430 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

The quotient of the division is 176531.59349593, and the remainder is 6.1e-08.