Let's divide 393759 by 81
The aim is to understand the frequency of 81 in 393759.

Advancing to step 1:
The number 81 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
Subtracting 0 from 3 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 81

On to step 2:
81 goes into 39 0 times with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Grab the next digit (3) from the dividend, add it to 39, then carry on: 393 / 81

Moving on to step 3:
When dividing 393 by 81, we get 4 with a remainder of 69.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 324 from 393, we get 69.
Append the next digit (7) from the dividend to 69 and continue with: 697 / 81

Moving on to step 4:
The number 81 fits into 697 8 times, leaving a remainder of 49.
Use 8 as the next digit of our solution. 
Result so far: 48.0
The remainder is 49 after subtracting 648 from 697.
Include the next digit (5) from the dividend after 49, then repeat: 495 / 81

Moving on to step 5:
495 divided by 81 is 6 with a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 486.0
Deduct 486 from 495 and we're left with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 81

Moving on to step 6:
99 divided by 81 is 1 with a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 4861.0
Subtracting 81 from 99 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 7:
When dividing 180 by 81, we get 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 4861.2
The remainder is 18 after subtracting 162 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 8:
81 goes into 180 2 times with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 4861.22
The remainder is 18 after subtracting 162 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 4861.22 with a remaining 0.018.