536918 divided by 81 
The aim is to understand the frequency of 81 in 536918.

Advancing to step 1:
5 divided by 81 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 81

Step 2:
81 goes into 53 0 times with a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Include the next digit (6) from the dividend after 53, then repeat: 536 / 81

Step 3:
536 divided by 81 is 6 with a remainder of 50.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 486 away from 536, we end up with 50.
Bring next digit (9) of the dividend behind the 50 and repeat the process: 509 / 81

Moving on to step 4:
When dividing 509 by 81, we get 6 with a remainder of 23.
Use 6 as the next digit of our solution. 
Result so far: 66.0
If we take 486 away from 509, we end up with 23.
Take the next digit (1) from the dividend and append it to 23, then repeat: 231 / 81

Let's proceed to step 5:
If we divide 231 by 81, we get 2 and a remainder of 69.
The number 2 becomes the next digit in our result. 
Result so far: 662.0
Subtracting 162 from 231 leaves us with 69.
Bring next digit (8) of the dividend behind the 69 and repeat the process: 698 / 81

Step 6:
If we divide 698 by 81, we get 8 and a remainder of 50.
Write down 8 as next digit of the result. 
Result so far: 6628.0
The remainder is 50 after subtracting 648 from 698.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 7:
81 goes into 500 6 times with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 6628.6
Deduct 486 from 500 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 8:
The number 81 fits into 140 1 times, leaving a remainder of 59.
Record the quotient 1 as the next digit in the result. 
Result so far: 6628.61
Deduct 81 from 140 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 9:
If we divide 590 by 81, we get 7 and a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 6628.617
Deduct 567 from 590 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 10:
230 divided by 81 is 2 with a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 6628.6172
Subtracting 162 from 230 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 11:
81 goes into 680 8 times with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 6628.61728
Deduct 648 from 680 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 12:
When dividing 320 by 81, we get 3 with a remainder of 77.
The number 3 becomes the next digit in our result. 
Result so far: 6628.617283
The remainder is 77 after subtracting 243 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Let's proceed to step 13:
If we divide 770 by 81, we get 9 and a remainder of 41.
Record the quotient 9 as the next digit in the result. 
Result so far: 6628.6172839
Subtracting 729 from 770 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 14:
If we divide 410 by 81, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 6628.61728395
If we subtract 405 from 410, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

In conclusion, the division gives 6628.61728395 with a balance of 5e-09.