Let's divide 803935 by 81
The aim is to understand the frequency of 81 in 803935.

On to step 1:
When dividing 8 by 81, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 81

Going ahead to step 2:
If we divide 80 by 81, we get 0 and a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Take the next digit (3) from the dividend and append it to 80, then repeat: 803 / 81

Going ahead to step 3:
The number 81 fits into 803 9 times, leaving a remainder of 74.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 729 from 803 to get 74.
Fetch the next digit (9) from the dividend, attach it to 74 and continue: 749 / 81

Let's proceed to step 4:
81 can be fit into 749 9 times, resulting in a remainder of 20.
Put 9 as the next digit of the answer. 
Result so far: 99.0
If we take 729 away from 749, we end up with 20.
Grab the next digit (3) from the dividend, add it to 20, then carry on: 203 / 81

Moving on to step 5:
81 can be fit into 203 2 times, resulting in a remainder of 41.
Use 2 as the next digit of our solution. 
Result so far: 992.0
The remainder is 41 after subtracting 162 from 203.
Bring next digit (5) of the dividend behind the 41 and repeat the process: 415 / 81

On to step 6:
415 divided by 81 is 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 9925.0
If we take 405 away from 415, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
81 goes into 100 1 times with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 9925.1
Subtracting 81 from 100 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 8:
81 goes into 190 2 times with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 9925.12
Deduct 162 from 190 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 9:
81 goes into 280 3 times with a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 9925.123
If we subtract 243 from 280, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 10:
81 can be fit into 370 4 times, resulting in a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 9925.1234
If we take 324 away from 370, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 11:
460 divided by 81 is 5 with a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 9925.12345
Subtract 405 from 460 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 12:
550 divided by 81 is 6 with a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 9925.123456
If we subtract 486 from 550, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 13:
640 divided by 81 is 7 with a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 9925.1234567
If we subtract 567 from 640, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 14:
If we divide 730 by 81, we get 9 and a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 9925.12345679
Subtract 729 from 730 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Our division results in 9925.12345679 with a remaining 1e-09.