930120 ÷ 81 
The aim is to understand the frequency of 81 in 930120.

On to step 1:
81 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 81

Going ahead to step 2:
The number 81 fits into 93 1 times, leaving a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 81 away from 93, we end up with 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 81

Let's proceed to step 3:
120 divided by 81 is 1 with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 81 from 120, we get 39.
Grab the next digit (1) from the dividend, add it to 39, then carry on: 391 / 81

Going ahead to step 4:
391 divided by 81 is 4 with a remainder of 67.
Put 4 as the next digit of the answer. 
Result so far: 114.0
If we subtract 324 from 391, we get 67.
Append the next digit (2) from the dividend to 67 and continue with: 672 / 81

Moving on to step 5:
81 goes into 672 8 times with a remainder of 24.
The next digit of our result is 8. 
Result so far: 1148.0
Subtract 648 from 672 to get 24.
Bring next digit (0) of the dividend behind the 24 and repeat the process: 240 / 81

Let's proceed to step 6:
81 can be fit into 240 2 times, resulting in a remainder of 78.
Put 2 as the next digit of the answer. 
Result so far: 11482.0
Deduct 162 from 240 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 7:
The number 81 fits into 780 9 times, leaving a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 11482.9
Subtract 729 from 780 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 8:
81 can be fit into 510 6 times, resulting in a remainder of 24.
The next digit of our result is 6. 
Result so far: 11482.96
The remainder is 24 after subtracting 486 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 9:
The number 81 fits into 240 2 times, leaving a remainder of 78.
Use 2 as the next digit of our solution. 
Result so far: 11482.962
The remainder is 78 after subtracting 162 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 10:
780 divided by 81 is 9 with a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 11482.9629
The remainder is 51 after subtracting 729 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 11:
When dividing 510 by 81, we get 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 11482.96296
Subtracting 486 from 510 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
When dividing 240 by 81, we get 2 with a remainder of 78.
Record the quotient 2 as the next digit in the result. 
Result so far: 11482.962962
If we subtract 162 from 240, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 13:
If we divide 780 by 81, we get 9 and a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 11482.9629629
If we take 729 away from 780, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 14:
If we divide 510 by 81, we get 6 and a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 11482.96296296
If we subtract 486 from 510, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Our division results in 11482.96296296 with a remaining 2.4e-08.