517242 ÷ 25 
We want to figure out the number of times 517242 can be divided by 25.

Advancing to step 1:
25 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 25

Advancing to step 2:
51 divided by 25 is 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 50 from 51 to get 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 25

Going ahead to step 3:
The number 25 fits into 17 0 times, leaving a remainder of 17.
The next digit of our result is 0. 
Result so far: 20.0
Deduct 0 from 17 and we're left with 17.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 25

On to step 4:
If we divide 172 by 25, we get 6 and a remainder of 22.
The number 6 becomes the next digit in our result. 
Result so far: 206.0
If we subtract 150 from 172, we get 22.
Include the next digit (4) from the dividend after 22, then repeat: 224 / 25

Going ahead to step 5:
25 goes into 224 8 times with a remainder of 24.
The next digit of our result is 8. 
Result so far: 2068.0
If we subtract 200 from 224, we get 24.
Fetch the next digit (2) from the dividend, attach it to 24 and continue: 242 / 25

Going ahead to step 6:
25 goes into 242 9 times with a remainder of 17.
The next digit of our result is 9. 
Result so far: 20689.0
If we take 225 away from 242, we end up 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.

Advancing to step 7:
If we divide 170 by 25, we get 6 and a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 20689.6
Deduct 150 from 170 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
If we divide 200 by 25, we get 8 and a remainder of 0.
The next digit of our result is 8. 
Result so far: 20689.68
Deduct 200 from 200 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
25 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 20689.68
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20689.68
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 20689.68, with a leftover of 0.0.