We look at the division of 57502521 by 220 
We want to figure out the number of times 57502521 can be divided by 220.

On to step 1:
If we divide 5 by 220, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 220

On to step 2:
The number 220 fits into 57 0 times, leaving a remainder of 57.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 57 leaves us with 57.
Take the next digit (5) from the dividend and append it to 57, then repeat: 575 / 220

Let's proceed to step 3:
575 divided by 220 is 2 with a remainder of 135.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 440 from 575, we get 135.
Append the next digit (0) from the dividend to 135 and continue with: 1350 / 220

Going ahead to step 4:
When dividing 1350 by 220, we get 6 with a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 26.0
Deduct 1320 from 1350 and we're left with 30.
Append the next digit (2) from the dividend to 30 and continue with: 302 / 220

Advancing to step 5:
220 goes into 302 1 times with a remainder of 82.
Write down 1 as next digit of the result. 
Result so far: 261.0
Deduct 220 from 302 and we're left with 82.
Include the next digit (5) from the dividend after 82, then repeat: 825 / 220

On to step 6:
When dividing 825 by 220, we get 3 with a remainder of 165.
Record the quotient 3 as the next digit in the result. 
Result so far: 2613.0
Subtracting 660 from 825 leaves us with 165.
Fetch the next digit (2) from the dividend, attach it to 165 and continue: 1652 / 220

Moving on to step 7:
If we divide 1652 by 220, we get 7 and a remainder of 112.
The number 7 becomes the next digit in our result. 
Result so far: 26137.0
If we take 1540 away from 1652, we end up with 112.
Fetch the next digit (1) from the dividend, attach it to 112 and continue: 1121 / 220

Going ahead to step 8:
When dividing 1121 by 220, we get 5 with a remainder of 21.
The next digit of our result is 5. 
Result so far: 261375.0
If we subtract 1100 from 1121, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 9:
The number 220 fits into 210 0 times, leaving a remainder of 210.
Record the quotient 0 as the next digit in the result. 
Result so far: 261375.0
Subtract 0 from 210 to 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.

On to step 10:
2100 divided by 220 is 9 with a remainder of 120.
The number 9 becomes the next digit in our result. 
Result so far: 261375.09
If we take 1980 away from 2100, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 11:
When dividing 1200 by 220, we get 5 with a remainder of 100.
The next digit of our result is 5. 
Result so far: 261375.095
Subtracting 1100 from 1200 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 12:
1000 divided by 220 is 4 with a remainder of 120.
Use 4 as the next digit of our solution. 
Result so far: 261375.0954
The remainder is 120 after subtracting 880 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 13:
220 goes into 1200 5 times with a remainder of 100.
Record the quotient 5 as the next digit in the result. 
Result so far: 261375.09545
Subtracting 1100 from 1200 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 14:
220 can be fit into 1000 4 times, resulting in a remainder of 120.
The next digit of our result is 4. 
Result so far: 261375.095454
Subtract 880 from 1000 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.

On to step 15:
If we divide 1200 by 220, we get 5 and a remainder of 100.
Write down 5 as next digit of the result. 
Result so far: 261375.0954545
Subtract 1100 from 1200 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 16:
When dividing 1000 by 220, we get 4 with a remainder of 120.
Put 4 as the next digit of the answer. 
Result so far: 261375.09545454
Subtracting 880 from 1000 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Our division results in 261375.09545454 with a remaining 1.2e-07.