253220 divided by 81 
The aim is to understand the frequency of 81 in 253220.

Moving on to step 1:
81 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 81

Let's proceed to step 2:
25 divided by 81 is 0 with a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Take the next digit (3) from the dividend and append it to 25, then repeat: 253 / 81

Going ahead to step 3:
253 divided by 81 is 3 with a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 243 away from 253, we end up with 10.
Include the next digit (2) from the dividend after 10, then repeat: 102 / 81

Moving on to step 4:
When dividing 102 by 81, we get 1 with a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 31.0
The remainder is 21 after subtracting 81 from 102.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 81

Advancing to step 5:
81 can be fit into 212 2 times, resulting in a remainder of 50.
The next digit of our result is 2. 
Result so far: 312.0
Deduct 162 from 212 and we're left with 50.
Take the next digit (0) from the dividend and append it to 50, then repeat: 500 / 81

On to step 6:
81 can be fit into 500 6 times, resulting in a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 3126.0
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.

Step 7:
The number 81 fits into 140 1 times, leaving a remainder of 59.
Use 1 as the next digit of our solution. 
Result so far: 3126.1
If we subtract 81 from 140, we get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 8:
When dividing 590 by 81, we get 7 with a remainder of 23.
The next digit of our result is 7. 
Result so far: 3126.17
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 9:
81 can be fit into 230 2 times, resulting in a remainder of 68.
Record the quotient 2 as the next digit in the result. 
Result so far: 3126.172
If we subtract 162 from 230, we get 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 10:
The number 81 fits into 680 8 times, leaving a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 3126.1728
The remainder is 32 after subtracting 648 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 11:
When dividing 320 by 81, we get 3 with a remainder of 77.
Use 3 as the next digit of our solution. 
Result so far: 3126.17283
If we take 243 away from 320, we end up with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 12:
When dividing 770 by 81, we get 9 with a remainder of 41.
The next digit of our result is 9. 
Result so far: 3126.172839
The remainder is 41 after subtracting 729 from 770.
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 13:
When dividing 410 by 81, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 3126.1728395
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.

On to step 14:
50 divided by 81 is 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 3126.1728395
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 3126.1728395 with a remaining 5e-08.