Let's divide 75644324 by 813
The aim is to understand the frequency of 813 in 75644324.

Moving on to step 1:
If we divide 7 by 813, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 813

Moving on to step 2:
When dividing 75 by 813, we get 0 with a remainder of 75.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 75, we get 75.
Grab the next digit (6) from the dividend, add it to 75, then carry on: 756 / 813

Let's proceed to step 3:
756 divided by 813 is 0 with a remainder of 756.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 756 after subtracting 0 from 756.
Append the next digit (4) from the dividend to 756 and continue with: 7564 / 813

Step 4:
If we divide 7564 by 813, we get 9 and a remainder of 247.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 7317 from 7564, we get 247.
Fetch the next digit (4) from the dividend, attach it to 247 and continue: 2474 / 813

Going ahead to step 5:
When dividing 2474 by 813, we get 3 with a remainder of 35.
Use 3 as the next digit of our solution. 
Result so far: 93.0
If we take 2439 away from 2474, we end up with 35.
Include the next digit (3) from the dividend after 35, then repeat: 353 / 813

Advancing to step 6:
If we divide 353 by 813, we get 0 and a remainder of 353.
The next digit of our result is 0. 
Result so far: 930.0
If we subtract 0 from 353, we get 353.
Append the next digit (2) from the dividend to 353 and continue with: 3532 / 813

Moving on to step 7:
813 goes into 3532 4 times with a remainder of 280.
Write down 4 as next digit of the result. 
Result so far: 9304.0
The remainder is 280 after subtracting 3252 from 3532.
Grab the next digit (4) from the dividend, add it to 280, then carry on: 2804 / 813

Let's proceed to step 8:
The number 813 fits into 2804 3 times, leaving a remainder of 365.
Put 3 as the next digit of the answer. 
Result so far: 93043.0
If we take 2439 away from 2804, we end up with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Moving on to step 9:
When dividing 3650 by 813, we get 4 with a remainder of 398.
Write down 4 as next digit of the result. 
Result so far: 93043.4
If we take 3252 away from 3650, we end up with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Let's proceed to step 10:
When dividing 3980 by 813, we get 4 with a remainder of 728.
The number 4 becomes the next digit in our result. 
Result so far: 93043.44
Deduct 3252 from 3980 and we're left with 728.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7280, and continue the process.

The final result is 93043.44 with a remainder of 0.728.