We look at the division of 3218 by 81 
The aim is to understand the frequency of 81 in 3218.

Let's proceed to step 1:
3 divided by 81 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 81

Going ahead to step 2:
When dividing 32 by 81, we get 0 with a remainder of 32.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 32, we end up with 32.
Take the next digit (1) from the dividend and append it to 32, then repeat: 321 / 81

Advancing to step 3:
81 goes into 321 3 times with a remainder of 78.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 243 from 321 to get 78.
Include the next digit (8) from the dividend after 78, then repeat: 788 / 81

Moving on to step 4:
When dividing 788 by 81, we get 9 with a remainder of 59.
Write down 9 as next digit of the result. 
Result so far: 39.0
Subtracting 729 from 788 leaves us 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.

Advancing to step 5:
81 can be fit into 590 7 times, resulting in a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 39.7
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.

On to step 6:
230 divided by 81 is 2 with a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 39.72
Deduct 162 from 230 and we're left 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.

Let's proceed to step 7:
81 goes into 680 8 times with a remainder of 32.
The next digit of our result is 8. 
Result so far: 39.728
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.

Going ahead to step 8:
320 divided by 81 is 3 with a remainder of 77.
Record the quotient 3 as the next digit in the result. 
Result so far: 39.7283
If we subtract 243 from 320, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

On to step 9:
770 divided by 81 is 9 with a remainder of 41.
The next digit of our result is 9. 
Result so far: 39.72839
Subtract 729 from 770 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 10:
When dividing 410 by 81, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 39.728395
Subtracting 405 from 410 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 11:
If we divide 50 by 81, we get 0 and a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 39.728395
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 12:
500 divided by 81 is 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 39.72839506
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.

The quotient of the division is 39.72839506, and the remainder is 1.4e-08.