We're dividing 8381747 by 857 
The aim is to understand the frequency of 857 in 8381747.

On to step 1:
When dividing 8 by 857, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 857

Going ahead to step 2:
The number 857 fits into 83 0 times, leaving a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Grab the next digit (8) from the dividend, add it to 83, then carry on: 838 / 857

Step 3:
If we divide 838 by 857, we get 0 and a remainder of 838.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 838 after subtracting 0 from 838.
Include the next digit (1) from the dividend after 838, then repeat: 8381 / 857

On to step 4:
857 goes into 8381 9 times with a remainder of 668.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 7713 from 8381, we get 668.
Include the next digit (7) from the dividend after 668, then repeat: 6687 / 857

Advancing to step 5:
When dividing 6687 by 857, we get 7 with a remainder of 688.
Record the quotient 7 as the next digit in the result. 
Result so far: 97.0
Subtract 5999 from 6687 to get 688.
Include the next digit (4) from the dividend after 688, then repeat: 6884 / 857

Step 6:
857 can be fit into 6884 8 times, resulting in a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 978.0
The remainder is 28 after subtracting 6856 from 6884.
Fetch the next digit (7) from the dividend, attach it to 28 and continue: 287 / 857

Advancing to step 7:
287 divided by 857 is 0 with a remainder of 287.
Put 0 as the next digit of the answer. 
Result so far: 9780.0
Subtracting 0 from 287 leaves us with 287.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2870, and continue the process.

Moving on to step 8:
857 can be fit into 2870 3 times, resulting in a remainder of 299.
Write down 3 as next digit of the result. 
Result so far: 9780.3
Subtract 2571 from 2870 to get 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

On to step 9:
The number 857 fits into 2990 3 times, leaving a remainder of 419.
Use 3 as the next digit of our solution. 
Result so far: 9780.33
Subtracting 2571 from 2990 leaves us with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

After the division, we end up with 9780.33 and a remainder of 0.419.