We're dividing 20918780 by 857 
The aim is to understand the frequency of 857 in 20918780.

Going ahead to step 1:
857 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 857

Going ahead to step 2:
If we divide 20 by 857, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 857

Moving on to step 3:
If we divide 209 by 857, we get 0 and a remainder of 209.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 209 after subtracting 0 from 209.
Append the next digit (1) from the dividend to 209 and continue with: 2091 / 857

Moving on to step 4:
If we divide 2091 by 857, we get 2 and a remainder of 377.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 1714 from 2091 leaves us with 377.
Append the next digit (8) from the dividend to 377 and continue with: 3778 / 857

On to step 5:
If we divide 3778 by 857, we get 4 and a remainder of 350.
The next digit of our result is 4. 
Result so far: 24.0
Subtract 3428 from 3778 to get 350.
Take the next digit (7) from the dividend and append it to 350, then repeat: 3507 / 857

Going ahead to step 6:
When dividing 3507 by 857, we get 4 with a remainder of 79.
Record the quotient 4 as the next digit in the result. 
Result so far: 244.0
Subtracting 3428 from 3507 leaves us with 79.
Take the next digit (8) from the dividend and append it to 79, then repeat: 798 / 857

On to step 7:
798 divided by 857 is 0 with a remainder of 798.
The next digit of our result is 0. 
Result so far: 2440.0
If we subtract 0 from 798, we get 798.
Append the next digit (0) from the dividend to 798 and continue with: 7980 / 857

Advancing to step 8:
If we divide 7980 by 857, we get 9 and a remainder of 267.
Record the quotient 9 as the next digit in the result. 
Result so far: 24409.0
Subtract 7713 from 7980 to get 267.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2670, and continue the process.

Step 9:
The number 857 fits into 2670 3 times, leaving a remainder of 99.
The number 3 becomes the next digit in our result. 
Result so far: 24409.3
If we subtract 2571 from 2670, we get 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Let's proceed to step 10:
When dividing 990 by 857, we get 1 with a remainder of 133.
Use 1 as the next digit of our solution. 
Result so far: 24409.31
If we take 857 away from 990, we end up with 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Going ahead to step 11:
857 goes into 1330 1 times with a remainder of 473.
The number 1 becomes the next digit in our result. 
Result so far: 24409.311
Subtracting 857 from 1330 leaves us with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

The final result is 24409.311 with a remainder of 0.0473.