915032 divided by 81 
The aim is to understand the frequency of 81 in 915032.

On to step 1:
If we divide 9 by 81, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 81

On to step 2:
If we divide 91 by 81, we get 1 and a remainder of 10.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 81 from 91 and we're left with 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 81

Let's proceed to step 3:
105 divided by 81 is 1 with a remainder of 24.
The next digit of our result is 1. 
Result so far: 11.0
If we subtract 81 from 105, we get 24.
Take the next digit (0) from the dividend and append it to 24, then repeat: 240 / 81

Let's proceed to step 4:
If we divide 240 by 81, we get 2 and a remainder of 78.
The number 2 becomes the next digit in our result. 
Result so far: 112.0
Deduct 162 from 240 and we're left with 78.
Fetch the next digit (3) from the dividend, attach it to 78 and continue: 783 / 81

Let's proceed to step 5:
If we divide 783 by 81, we get 9 and a remainder of 54.
Record the quotient 9 as the next digit in the result. 
Result so far: 1129.0
The remainder is 54 after subtracting 729 from 783.
Include the next digit (2) from the dividend after 54, then repeat: 542 / 81

Let's proceed to step 6:
81 can be fit into 542 6 times, resulting in a remainder of 56.
Record the quotient 6 as the next digit in the result. 
Result so far: 11296.0
The remainder is 56 after subtracting 486 from 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 7:
If we divide 560 by 81, we get 6 and a remainder of 74.
Write down 6 as next digit of the result. 
Result so far: 11296.6
Deduct 486 from 560 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 8:
81 can be fit into 740 9 times, resulting in a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 11296.69
Deduct 729 from 740 and we're left 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.

Advancing to step 9:
When dividing 110 by 81, we get 1 with a remainder of 29.
The next digit of our result is 1. 
Result so far: 11296.691
Subtracting 81 from 110 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 10:
When dividing 290 by 81, we get 3 with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 11296.6913
Deduct 243 from 290 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on 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: 11296.69135
If we subtract 405 from 470, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 12:
81 goes into 650 8 times with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 11296.691358
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.

On to step 13:
If we divide 20 by 81, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 11296.691358
If we take 0 away from 20, we end up 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.

Advancing to step 14:
81 can be fit into 200 2 times, resulting in a remainder of 38.
The next digit of our result is 2. 
Result so far: 11296.69135802
If we subtract 162 from 200, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The final outcome is 11296.69135802, with a leftover of 3.8e-08.