We look at the division of 800266 by 81 
The aim is to understand the frequency of 81 in 800266.

On to step 1:
8 divided by 81 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 81

Step 2:
80 divided by 81 is 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Fetch the next digit (0) from the dividend, attach it to 80 and continue: 800 / 81

On to step 3:
81 goes into 800 9 times with a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 729 from 800 to get 71.
Include the next digit (2) from the dividend after 71, then repeat: 712 / 81

Step 4:
81 can be fit into 712 8 times, resulting in a remainder of 64.
Write down 8 as next digit of the result. 
Result so far: 98.0
If we take 648 away from 712, we end up with 64.
Bring next digit (6) of the dividend behind the 64 and repeat the process: 646 / 81

Let's proceed to step 5:
The number 81 fits into 646 7 times, leaving a remainder of 79.
Use 7 as the next digit of our solution. 
Result so far: 987.0
If we take 567 away from 646, we end up with 79.
Append the next digit (6) from the dividend to 79 and continue with: 796 / 81

Step 6:
The number 81 fits into 796 9 times, leaving a remainder of 67.
The next digit of our result is 9. 
Result so far: 9879.0
Subtract 729 from 796 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Moving on to step 7:
81 goes into 670 8 times with a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 9879.8
Deduct 648 from 670 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 8:
When dividing 220 by 81, we get 2 with a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 9879.82
The remainder is 58 after subtracting 162 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 9:
When dividing 580 by 81, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 9879.827
If we take 567 away from 580, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 10:
When dividing 130 by 81, we get 1 with a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 9879.8271
If we take 81 away from 130, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Going ahead to step 11:
81 can be fit into 490 6 times, resulting in a remainder of 4.
The next digit of our result is 6. 
Result so far: 9879.82716
If we take 486 away from 490, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
The number 81 fits into 40 0 times, leaving a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 9879.82716
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 13:
The number 81 fits into 400 4 times, leaving a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 9879.8271604
The remainder is 76 after subtracting 324 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 14:
81 can be fit into 760 9 times, resulting in a remainder of 31.
The next digit of our result is 9. 
Result so far: 9879.82716049
The remainder is 31 after subtracting 729 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The quotient of the division is 9879.82716049, and the remainder is 3.1e-08.