86458280 ÷ 57 
The aim is to understand the frequency of 57 in 86458280.

Advancing to step 1:
8 divided by 57 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 57

Going ahead to step 2:
57 goes into 86 1 times with a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 57 away from 86, we end up with 29.
Grab the next digit (4) from the dividend, add it to 29, then carry on: 294 / 57

Advancing to step 3:
The number 57 fits into 294 5 times, leaving a remainder of 9.
The next digit of our result is 5. 
Result so far: 15.0
If we take 285 away from 294, we end up with 9.
Bring next digit (5) of the dividend behind the 9 and repeat the process: 95 / 57

Moving on to step 4:
If we divide 95 by 57, we get 1 and a remainder of 38.
The number 1 becomes the next digit in our result. 
Result so far: 151.0
Subtracting 57 from 95 leaves us with 38.
Include the next digit (8) from the dividend after 38, then repeat: 388 / 57

On to step 5:
The number 57 fits into 388 6 times, leaving a remainder of 46.
Write down 6 as next digit of the result. 
Result so far: 1516.0
If we subtract 342 from 388, we get 46.
Fetch the next digit (2) from the dividend, attach it to 46 and continue: 462 / 57

Step 6:
57 can be fit into 462 8 times, resulting in a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 15168.0
Subtract 456 from 462 to get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 57

Going ahead to step 7:
The number 57 fits into 68 1 times, leaving a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 151681.0
Subtract 57 from 68 to get 11.
Append the next digit (0) from the dividend to 11 and continue with: 110 / 57

Step 8:
57 goes into 110 1 times with a remainder of 53.
Use 1 as the next digit of our solution. 
Result so far: 1516811.0
Subtracting 57 from 110 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 9:
530 divided by 57 is 9 with a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 1516811.9
If we subtract 513 from 530, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 10:
When dividing 170 by 57, we get 2 with a remainder of 56.
The number 2 becomes the next digit in our result. 
Result so far: 1516811.92
Subtracting 114 from 170 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 11:
57 goes into 560 9 times with a remainder of 47.
The next digit of our result is 9. 
Result so far: 1516811.929
If we take 513 away from 560, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 12:
57 goes into 470 8 times with a remainder of 14.
The next digit of our result is 8. 
Result so far: 1516811.9298
Deduct 456 from 470 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 13:
57 can be fit into 140 2 times, resulting in a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 1516811.92982
If we subtract 114 from 140, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 14:
The number 57 fits into 260 4 times, leaving a remainder of 32.
Put 4 as the next digit of the answer. 
Result so far: 1516811.929824
If we take 228 away from 260, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 15:
The number 57 fits into 320 5 times, leaving a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 1516811.9298245
If we subtract 285 from 320, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 16:
If we divide 350 by 57, we get 6 and a remainder of 8.
The next digit of our result is 6. 
Result so far: 1516811.92982456
If we take 342 away from 350, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 1516811.92982456 with a remaining 8e-09.