We divide 717252 by 21
We want to figure out the number of times 717252 can be divided by 21.

On to step 1:
If we divide 7 by 21, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 21

Advancing to step 2:
If we divide 71 by 21, we get 3 and a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 63 from 71, we get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 21

On to step 3:
21 goes into 87 4 times with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 34.0
Subtracting 84 from 87 leaves us with 3.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 21

Moving on to step 4:
32 divided by 21 is 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 341.0
The remainder is 11 after subtracting 21 from 32.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 21

On to step 5:
When dividing 115 by 21, we get 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 3415.0
If we take 105 away from 115, we end up with 10.
Fetch the next digit (2) from the dividend, attach it to 10 and continue: 102 / 21

Going ahead to step 6:
21 goes into 102 4 times with a remainder of 18.
Use 4 as the next digit of our solution. 
Result so far: 34154.0
Subtracting 84 from 102 leaves us with 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 7:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 34154.8
Deduct 168 from 180 and we're left 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.

Advancing to step 8:
21 goes into 120 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 34154.85
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 9:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 34154.857
Deduct 147 from 150 and we're left 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.

Advancing to step 10:
30 divided by 21 is 1 with a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 34154.8571
If we take 21 away from 30, 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.

Step 11:
90 divided by 21 is 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 34154.85714
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 12:
60 divided by 21 is 2 with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 34154.857142
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 13:
21 goes into 180 8 times with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 34154.8571428
Subtract 168 from 180 to 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.

Moving on to step 14:
When dividing 120 by 21, we get 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 34154.85714285
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 34154.85714285 with a remainder of 1.5e-08.