We divide 20554 by 81
The aim is to understand the frequency of 81 in 20554.

Step 1:
81 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 81

Step 2:
When dividing 20 by 81, we get 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 20 to get 20.
Take the next digit (5) from the dividend and append it to 20, then repeat: 205 / 81

Moving on to step 3:
If we divide 205 by 81, we get 2 and a remainder of 43.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 43 after subtracting 162 from 205.
Include the next digit (5) from the dividend after 43, then repeat: 435 / 81

Going ahead to step 4:
The number 81 fits into 435 5 times, leaving a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
If we take 405 away from 435, we end up with 30.
Append the next digit (4) from the dividend to 30 and continue with: 304 / 81

Going ahead to step 5:
81 goes into 304 3 times with a remainder of 61.
The next digit of our result is 3. 
Result so far: 253.0
If we take 243 away from 304, 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.

Let's proceed to step 6:
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: 253.7
The remainder is 43 after subtracting 567 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 7:
When dividing 430 by 81, we get 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 253.75
If we take 405 away from 430, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 8:
The number 81 fits into 250 3 times, leaving a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 253.753
The remainder is 7 after subtracting 243 from 250.
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 9:
When dividing 70 by 81, we get 0 with a remainder of 70.
The next digit of our result is 0. 
Result so far: 253.753
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 10:
700 divided by 81 is 8 with a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 253.75308
If we take 648 away from 700, we end up 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.

Moving on to step 11:
520 divided by 81 is 6 with a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 253.753086
If we take 486 away from 520, we end up 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.

Moving on to step 12:
If we divide 340 by 81, we get 4 and a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 253.7530864
If we take 324 away from 340, we end up 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.

Moving on to step 13:
When dividing 160 by 81, we get 1 with a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 253.75308641
The remainder is 79 after subtracting 81 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

The final outcome is 253.75308641, with a leftover of 7.9e-08.