We divide 72128787 by 255
We want to figure out the number of times 72128787 can be divided by 255.

On to step 1:
If we divide 7 by 255, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 255

Let's proceed to step 2:
When dividing 72 by 255, we get 0 with a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Bring next digit (1) of the dividend behind the 72 and repeat the process: 721 / 255

Advancing to step 3:
721 divided by 255 is 2 with a remainder of 211.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 510 from 721 leaves us with 211.
Take the next digit (2) from the dividend and append it to 211, then repeat: 2112 / 255

Let's proceed to step 4:
If we divide 2112 by 255, we get 8 and a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 28.0
The remainder is 72 after subtracting 2040 from 2112.
Include the next digit (8) from the dividend after 72, then repeat: 728 / 255

Going ahead to step 5:
255 goes into 728 2 times with a remainder of 218.
Write down 2 as next digit of the result. 
Result so far: 282.0
Subtract 510 from 728 to get 218.
Grab the next digit (7) from the dividend, add it to 218, then carry on: 2187 / 255

Moving on to step 6:
255 goes into 2187 8 times with a remainder of 147.
Use 8 as the next digit of our solution. 
Result so far: 2828.0
If we subtract 2040 from 2187, we get 147.
Take the next digit (8) from the dividend and append it to 147, then repeat: 1478 / 255

Let's proceed to step 7:
255 goes into 1478 5 times with a remainder of 203.
The number 5 becomes the next digit in our result. 
Result so far: 28285.0
Deduct 1275 from 1478 and we're left with 203.
Grab the next digit (7) from the dividend, add it to 203, then carry on: 2037 / 255

On to step 8:
255 goes into 2037 7 times with a remainder of 252.
The next digit of our result is 7. 
Result so far: 282857.0
Subtract 1785 from 2037 to get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Going ahead to step 9:
2520 divided by 255 is 9 with a remainder of 225.
The next digit of our result is 9. 
Result so far: 282857.9
Deduct 2295 from 2520 and we're left with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Moving on to step 10:
If we divide 2250 by 255, we get 8 and a remainder of 210.
Use 8 as the next digit of our solution. 
Result so far: 282857.98
If we subtract 2040 from 2250, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Step 11:
255 can be fit into 2100 8 times, resulting in a remainder of 60.
Put 8 as the next digit of the answer. 
Result so far: 282857.988
Subtract 2040 from 2100 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

After the division, we end up with 282857.988 and a remainder of 0.006.