We divide 234520 by 81
The aim is to understand the frequency of 81 in 234520.

Going ahead to step 1:
The number 81 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 81

Going ahead to step 2:
81 goes into 23 0 times with a remainder of 23.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 23 leaves us with 23.
Include the next digit (4) from the dividend after 23, then repeat: 234 / 81

Advancing to step 3:
81 can be fit into 234 2 times, resulting in a remainder of 72.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 162 away from 234, we end up with 72.
Fetch the next digit (5) from the dividend, attach it to 72 and continue: 725 / 81

Moving on to step 4:
725 divided by 81 is 8 with a remainder of 77.
The next digit of our result is 8. 
Result so far: 28.0
If we subtract 648 from 725, we get 77.
Grab the next digit (2) from the dividend, add it to 77, then carry on: 772 / 81

Moving on to step 5:
If we divide 772 by 81, we get 9 and a remainder of 43.
The next digit of our result is 9. 
Result so far: 289.0
The remainder is 43 after subtracting 729 from 772.
Take the next digit (0) from the dividend and append it to 43, then repeat: 430 / 81

Advancing to step 6:
430 divided by 81 is 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 2895.0
The remainder is 25 after subtracting 405 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 7:
81 can be fit into 250 3 times, resulting in a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 2895.3
Deduct 243 from 250 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 8:
When dividing 70 by 81, we get 0 with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 2895.3
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 9:
700 divided by 81 is 8 with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 2895.308
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.

On to step 10:
If we divide 520 by 81, we get 6 and a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 2895.3086
Subtract 486 from 520 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 11:
81 goes into 340 4 times with a remainder of 16.
The next digit of our result is 4. 
Result so far: 2895.30864
The remainder is 16 after subtracting 324 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 12:
81 can be fit into 160 1 times, resulting in a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 2895.308641
Subtracting 81 from 160 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 13:
When dividing 790 by 81, we get 9 with a remainder of 61.
Put 9 as the next digit of the answer. 
Result so far: 2895.3086419
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 14:
81 can be fit into 610 7 times, resulting in a remainder of 43.
The next digit of our result is 7. 
Result so far: 2895.30864197
Subtract 567 from 610 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

In conclusion, the division gives 2895.30864197 with a balance of 4.3e-08.