793710 divided by 81 
The aim is to understand the frequency of 81 in 793710.

Going ahead to step 1:
When dividing 7 by 81, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 81

Moving on to step 2:
If we divide 79 by 81, we get 0 and a remainder of 79.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 79 and we're left with 79.
Append the next digit (3) from the dividend to 79 and continue with: 793 / 81

Advancing to step 3:
The number 81 fits into 793 9 times, leaving a remainder of 64.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtract 729 from 793 to get 64.
Bring next digit (7) of the dividend behind the 64 and repeat the process: 647 / 81

Advancing to step 4:
When dividing 647 by 81, we get 7 with a remainder of 80.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Subtract 567 from 647 to get 80.
Include the next digit (1) from the dividend after 80, then repeat: 801 / 81

On to step 5:
The number 81 fits into 801 9 times, leaving a remainder of 72.
Write down 9 as next digit of the result. 
Result so far: 979.0
Subtract 729 from 801 to get 72.
Grab the next digit (0) from the dividend, add it to 72, then carry on: 720 / 81

Moving on to step 6:
The number 81 fits into 720 8 times, leaving a remainder of 72.
The next digit of our result is 8. 
Result so far: 9798.0
Deduct 648 from 720 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 7:
81 goes into 720 8 times with a remainder of 72.
Use 8 as the next digit of our solution. 
Result so far: 9798.8
Deduct 648 from 720 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 8:
81 can be fit into 720 8 times, resulting in a remainder of 72.
The next digit of our result is 8. 
Result so far: 9798.88
Deduct 648 from 720 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

After the division, we end up with 9798.88 and a remainder of 0.072.