We're dividing 39237069 by 813 
The aim is to understand the frequency of 813 in 39237069.

Going ahead to step 1:
The number 813 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 813

On to step 2:
813 goes into 39 0 times with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Grab the next digit (2) from the dividend, add it to 39, then carry on: 392 / 813

Going ahead to step 3:
If we divide 392 by 813, we get 0 and a remainder of 392.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 392 after subtracting 0 from 392.
Grab the next digit (3) from the dividend, add it to 392, then carry on: 3923 / 813

Going ahead to step 4:
If we divide 3923 by 813, we get 4 and a remainder of 671.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 3252 from 3923 to get 671.
Bring next digit (7) of the dividend behind the 671 and repeat the process: 6717 / 813

Going ahead to step 5:
If we divide 6717 by 813, we get 8 and a remainder of 213.
The next digit of our result is 8. 
Result so far: 48.0
Deduct 6504 from 6717 and we're left with 213.
Include the next digit (0) from the dividend after 213, then repeat: 2130 / 813

Moving on to step 6:
The number 813 fits into 2130 2 times, leaving a remainder of 504.
The next digit of our result is 2. 
Result so far: 482.0
If we take 1626 away from 2130, we end up with 504.
Grab the next digit (6) from the dividend, add it to 504, then carry on: 5046 / 813

Step 7:
813 goes into 5046 6 times with a remainder of 168.
Record the quotient 6 as the next digit in the result. 
Result so far: 4826.0
If we subtract 4878 from 5046, we get 168.
Grab the next digit (9) from the dividend, add it to 168, then carry on: 1689 / 813

Going ahead to step 8:
If we divide 1689 by 813, we get 2 and a remainder of 63.
Use 2 as the next digit of our solution. 
Result so far: 48262.0
The remainder is 63 after subtracting 1626 from 1689.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 9:
When dividing 630 by 813, we get 0 with a remainder of 630.
Record the quotient 0 as the next digit in the result. 
Result so far: 48262.0
Subtract 0 from 630 to get 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Let's proceed to step 10:
813 can be fit into 6300 7 times, resulting in a remainder of 609.
The next digit of our result is 7. 
Result so far: 48262.07
Deduct 5691 from 6300 and we're left with 609.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6090, and continue the process.

Advancing to step 11:
813 can be fit into 6090 7 times, resulting in a remainder of 399.
Record the quotient 7 as the next digit in the result. 
Result so far: 48262.077
Subtracting 5691 from 6090 leaves us with 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

After the division, we end up with 48262.077 and a remainder of 0.0399.