13223 divided by 81 
The aim is to understand the frequency of 81 in 13223.

Going ahead to step 1:
1 divided by 81 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 81

Advancing to step 2:
The number 81 fits into 13 0 times, leaving a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Take the next digit (2) from the dividend and append it to 13, then repeat: 132 / 81

Step 3:
The number 81 fits into 132 1 times, leaving a remainder of 51.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 81 away from 132, we end up with 51.
Include the next digit (2) from the dividend after 51, then repeat: 512 / 81

Let's proceed to step 4:
81 goes into 512 6 times with a remainder of 26.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Deduct 486 from 512 and we're left with 26.
Grab the next digit (3) from the dividend, add it to 26, then carry on: 263 / 81

On to step 5:
When dividing 263 by 81, we get 3 with a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 163.0
The remainder is 20 after subtracting 243 from 263.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 6:
If we divide 200 by 81, we get 2 and a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 163.2
If we take 162 away from 200, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 7:
81 goes into 380 4 times with a remainder of 56.
The next digit of our result is 4. 
Result so far: 163.24
The remainder is 56 after subtracting 324 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 8:
81 goes into 560 6 times with a remainder of 74.
Put 6 as the next digit of the answer. 
Result so far: 163.246
The remainder is 74 after subtracting 486 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 9:
If we divide 740 by 81, we get 9 and a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 163.2469
Subtracting 729 from 740 leaves us 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.

Let's proceed to step 10:
110 divided by 81 is 1 with a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 163.24691
If we subtract 81 from 110, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 11:
The number 81 fits into 290 3 times, leaving a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 163.246913
The remainder is 47 after subtracting 243 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 12:
81 can be fit into 470 5 times, resulting in a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 163.2469135
If we take 405 away from 470, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 13:
650 divided by 81 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 163.24691358
Subtract 648 from 650 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 163.24691358 with a remainder of 2e-09.