We're dividing 42438918 by 813 
The aim is to understand the frequency of 813 in 42438918.

Advancing to step 1:
When dividing 4 by 813, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 813

Advancing to step 2:
42 divided by 813 is 0 with a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 813

On to step 3:
424 divided by 813 is 0 with a remainder of 424.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 424 to get 424.
Grab the next digit (3) from the dividend, add it to 424, then carry on: 4243 / 813

Let's proceed to step 4:
813 goes into 4243 5 times with a remainder of 178.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 4065 from 4243 leaves us with 178.
Bring next digit (8) of the dividend behind the 178 and repeat the process: 1788 / 813

Moving on to step 5:
If we divide 1788 by 813, we get 2 and a remainder of 162.
Put 2 as the next digit of the answer. 
Result so far: 52.0
Subtracting 1626 from 1788 leaves us with 162.
Fetch the next digit (9) from the dividend, attach it to 162 and continue: 1629 / 813

Step 6:
The number 813 fits into 1629 2 times, leaving a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 522.0
If we take 1626 away from 1629, we end up with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 813

Let's proceed to step 7:
When dividing 31 by 813, we get 0 with a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 5220.0
Subtract 0 from 31 to get 31.
Bring next digit (8) of the dividend behind the 31 and repeat the process: 318 / 813

Advancing to step 8:
813 can be fit into 318 0 times, resulting in a remainder of 318.
Put 0 as the next digit of the answer. 
Result so far: 52200.0
Deduct 0 from 318 and we're left with 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Let's proceed to step 9:
When dividing 3180 by 813, we get 3 with a remainder of 741.
Put 3 as the next digit of the answer. 
Result so far: 52200.3
If we subtract 2439 from 3180, we get 741.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7410, and continue the process.

Let's proceed to step 10:
813 goes into 7410 9 times with a remainder of 93.
The next digit of our result is 9. 
Result so far: 52200.39
Deduct 7317 from 7410 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Going ahead to step 11:
If we divide 930 by 813, we get 1 and a remainder of 117.
Write down 1 as next digit of the result. 
Result so far: 52200.391
Deduct 813 from 930 and we're left with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Going ahead to step 12:
When dividing 1170 by 813, we get 1 with a remainder of 357.
The next digit of our result is 1. 
Result so far: 52200.3911
If we subtract 813 from 1170, we get 357.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3570, and continue the process.

In conclusion, the division gives 52200.3911 with a balance of 0.00357.