We're dividing 7788903 by 457 
The aim is to understand the frequency of 457 in 7788903.

Going ahead to step 1:
If we divide 7 by 457, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 457

Let's proceed to step 2:
The number 457 fits into 77 0 times, leaving a remainder of 77.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Include the next digit (8) from the dividend after 77, then repeat: 778 / 457

Going ahead to step 3:
The number 457 fits into 778 1 times, leaving a remainder of 321.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 457 from 778 and we're left with 321.
Bring next digit (8) of the dividend behind the 321 and repeat the process: 3218 / 457

Advancing to step 4:
When dividing 3218 by 457, we get 7 with a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtract 3199 from 3218 to get 19.
Fetch the next digit (9) from the dividend, attach it to 19 and continue: 199 / 457

Moving on to step 5:
The number 457 fits into 199 0 times, leaving a remainder of 199.
Record the quotient 0 as the next digit in the result. 
Result so far: 170.0
If we subtract 0 from 199, we get 199.
Grab the next digit (0) from the dividend, add it to 199, then carry on: 1990 / 457

Let's proceed to step 6:
1990 divided by 457 is 4 with a remainder of 162.
The next digit of our result is 4. 
Result so far: 1704.0
If we subtract 1828 from 1990, we get 162.
Bring next digit (3) of the dividend behind the 162 and repeat the process: 1623 / 457

Going ahead to step 7:
1623 divided by 457 is 3 with a remainder of 252.
The next digit of our result is 3. 
Result so far: 17043.0
Deduct 1371 from 1623 and we're left with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Advancing to step 8:
The number 457 fits into 2520 5 times, leaving a remainder of 235.
The number 5 becomes the next digit in our result. 
Result so far: 17043.5
Deduct 2285 from 2520 and we're left with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Advancing to step 9:
If we divide 2350 by 457, we get 5 and a remainder of 65.
The number 5 becomes the next digit in our result. 
Result so far: 17043.55
The remainder is 65 after subtracting 2285 from 2350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Our division results in 17043.55 with a remaining 0.065.