We're dividing 181762 by 81 
The aim is to understand the frequency of 81 in 181762.

Step 1:
The number 81 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 81

Let's proceed to step 2:
When dividing 18 by 81, we get 0 with a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Fetch the next digit (1) from the dividend, attach it to 18 and continue: 181 / 81

Moving on to step 3:
81 can be fit into 181 2 times, resulting in a remainder of 19.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 162 from 181 to get 19.
Include the next digit (7) from the dividend after 19, then repeat: 197 / 81

On to step 4:
When dividing 197 by 81, we get 2 with a remainder of 35.
Write down 2 as next digit of the result. 
Result so far: 22.0
Deduct 162 from 197 and we're left with 35.
Grab the next digit (6) from the dividend, add it to 35, then carry on: 356 / 81

Advancing to step 5:
81 can be fit into 356 4 times, resulting in a remainder of 32.
Put 4 as the next digit of the answer. 
Result so far: 224.0
If we subtract 324 from 356, we get 32.
Append the next digit (2) from the dividend to 32 and continue with: 322 / 81

Advancing to step 6:
81 can be fit into 322 3 times, resulting in a remainder of 79.
Use 3 as the next digit of our solution. 
Result so far: 2243.0
If we subtract 243 from 322, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 7:
81 goes into 790 9 times with a remainder of 61.
The number 9 becomes the next digit in our result. 
Result so far: 2243.9
If we take 729 away from 790, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 8:
When dividing 610 by 81, we get 7 with a remainder of 43.
The next digit of our result is 7. 
Result so far: 2243.97
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 9:
81 goes into 430 5 times with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 2243.975
Subtract 405 from 430 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 10:
If we divide 250 by 81, we get 3 and a remainder of 7.
The next digit of our result is 3. 
Result so far: 2243.9753
Subtract 243 from 250 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 11:
81 goes into 70 0 times with a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 2243.9753
The remainder is 70 after subtracting 0 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 12:
700 divided by 81 is 8 with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 2243.975308
Deduct 648 from 700 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 13:
81 goes into 520 6 times with a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 2243.9753086
Subtracting 486 from 520 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 14:
81 goes into 340 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 2243.97530864
Deduct 324 from 340 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 2243.97530864 with a remainder of 1.6e-08.