817265 ÷ 81 
The aim is to understand the frequency of 81 in 817265.

On to step 1:
The number 81 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 81

Moving on to step 2:
81 goes into 81 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 81 from 81 leaves us with 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 81

Step 3:
The number 81 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we subtract 0 from 7, we get 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 81

Moving on to step 4:
81 can be fit into 72 0 times, resulting in a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
Subtract 0 from 72 to get 72.
Append the next digit (6) from the dividend to 72 and continue with: 726 / 81

Advancing to step 5:
If we divide 726 by 81, we get 8 and a remainder of 78.
The next digit of our result is 8. 
Result so far: 1008.0
If we take 648 away from 726, we end up with 78.
Take the next digit (5) from the dividend and append it to 78, then repeat: 785 / 81

Step 6:
81 can be fit into 785 9 times, resulting in a remainder of 56.
Put 9 as the next digit of the answer. 
Result so far: 10089.0
If we subtract 729 from 785, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 7:
560 divided by 81 is 6 with a remainder of 74.
Use 6 as the next digit of our solution. 
Result so far: 10089.6
Subtract 486 from 560 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 8:
740 divided by 81 is 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 10089.69
Subtracting 729 from 740 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 9:
The number 81 fits into 110 1 times, leaving a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 10089.691
The remainder is 29 after subtracting 81 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 10:
81 goes into 290 3 times with a remainder of 47.
Write down 3 as next digit of the result. 
Result so far: 10089.6913
Subtract 243 from 290 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 11:
When dividing 470 by 81, we get 5 with a remainder of 65.
The next digit of our result is 5. 
Result so far: 10089.69135
If we take 405 away from 470, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 12:
81 can be fit into 650 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 10089.691358
Deduct 648 from 650 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 13:
81 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 10089.691358
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 14:
When dividing 200 by 81, we get 2 with a remainder of 38.
The next digit of our result is 2. 
Result so far: 10089.69135802
The remainder is 38 after subtracting 162 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Our division results in 10089.69135802 with a remaining 3.8e-08.