564099 divided by 81 
The aim is to understand the frequency of 81 in 564099.

Going ahead to step 1:
81 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 81

Moving on to step 2:
If we divide 56 by 81, we get 0 and a remainder of 56.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 56, we end up with 56.
Bring next digit (4) of the dividend behind the 56 and repeat the process: 564 / 81

Moving on to step 3:
If we divide 564 by 81, we get 6 and a remainder of 78.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 486 from 564 to get 78.
Take the next digit (0) from the dividend and append it to 78, then repeat: 780 / 81

On to step 4:
780 divided by 81 is 9 with a remainder of 51.
Record the quotient 9 as the next digit in the result. 
Result so far: 69.0
If we subtract 729 from 780, we get 51.
Bring next digit (9) of the dividend behind the 51 and repeat the process: 519 / 81

Moving on to step 5:
519 divided by 81 is 6 with a remainder of 33.
The next digit of our result is 6. 
Result so far: 696.0
Deduct 486 from 519 and we're left with 33.
Include the next digit (9) from the dividend after 33, then repeat: 339 / 81

Going ahead to step 6:
339 divided by 81 is 4 with a remainder of 15.
The number 4 becomes the next digit in our result. 
Result so far: 6964.0
If we subtract 324 from 339, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 7:
The number 81 fits into 150 1 times, leaving a remainder of 69.
Put 1 as the next digit of the answer. 
Result so far: 6964.1
The remainder is 69 after subtracting 81 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 8:
81 can be fit into 690 8 times, resulting in a remainder of 42.
Write down 8 as next digit of the result. 
Result so far: 6964.18
Subtracting 648 from 690 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 9:
420 divided by 81 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 6964.185
If we subtract 405 from 420, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 10:
81 goes into 150 1 times with a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 6964.1851
The remainder is 69 after subtracting 81 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Advancing to step 11:
The number 81 fits into 690 8 times, leaving a remainder of 42.
The next digit of our result is 8. 
Result so far: 6964.18518
Subtracting 648 from 690 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 12:
When dividing 420 by 81, we get 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 6964.185185
Subtracting 405 from 420 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 13:
81 goes into 150 1 times with a remainder of 69.
Put 1 as the next digit of the answer. 
Result so far: 6964.1851851
If we subtract 81 from 150, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 14:
81 goes into 690 8 times with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 6964.18518518
Deduct 648 from 690 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

In conclusion, the division gives 6964.18518518 with a balance of 4.2e-08.