878200 ÷ 57 
The aim is to understand the frequency of 57 in 878200.

Advancing to step 1:
57 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 57

Let's proceed to step 2:
The number 57 fits into 87 1 times, leaving a remainder of 30.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 57 from 87 to get 30.
Append the next digit (8) from the dividend to 30 and continue with: 308 / 57

Advancing to step 3:
57 goes into 308 5 times with a remainder of 23.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we subtract 285 from 308, we get 23.
Take the next digit (2) from the dividend and append it to 23, then repeat: 232 / 57

Step 4:
When dividing 232 by 57, we get 4 with a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 154.0
Subtract 228 from 232 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 57

Advancing to step 5:
40 divided by 57 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 1540.0
Deduct 0 from 40 and we're left with 40.
Bring next digit (0) of the dividend behind the 40 and repeat the process: 400 / 57

Step 6:
The number 57 fits into 400 7 times, leaving a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 15407.0
If we subtract 399 from 400, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
The number 57 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 15407.0
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
57 can be fit into 100 1 times, resulting in a remainder of 43.
Record the quotient 1 as the next digit in the result. 
Result so far: 15407.01
The remainder is 43 after subtracting 57 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 9:
The number 57 fits into 430 7 times, leaving a remainder of 31.
Use 7 as the next digit of our solution. 
Result so far: 15407.017
Subtract 399 from 430 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 10:
When dividing 310 by 57, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 15407.0175
Deduct 285 from 310 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 11:
57 can be fit into 250 4 times, resulting in a remainder of 22.
Use 4 as the next digit of our solution. 
Result so far: 15407.01754
Subtracting 228 from 250 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 12:
The number 57 fits into 220 3 times, leaving a remainder of 49.
The number 3 becomes the next digit in our result. 
Result so far: 15407.017543
Subtract 171 from 220 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Going ahead to step 13:
If we divide 490 by 57, we get 8 and a remainder of 34.
Write down 8 as next digit of the result. 
Result so far: 15407.0175438
Subtract 456 from 490 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 14:
340 divided by 57 is 5 with a remainder of 55.
The next digit of our result is 5. 
Result so far: 15407.01754385
The remainder is 55 after subtracting 285 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

The final outcome is 15407.01754385, with a leftover of 5.5e-08.