We're dividing 787373 by 81 
The aim is to understand the frequency of 81 in 787373.

Advancing to step 1:
81 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 81

Going ahead to step 2:
The number 81 fits into 78 0 times, leaving a remainder of 78.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Bring next digit (7) of the dividend behind the 78 and repeat the process: 787 / 81

Let's proceed to step 3:
If we divide 787 by 81, we get 9 and a remainder of 58.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 729 from 787 to get 58.
Append the next digit (3) from the dividend to 58 and continue with: 583 / 81

Advancing to step 4:
583 divided by 81 is 7 with a remainder of 16.
Write down 7 as next digit of the result. 
Result so far: 97.0
If we take 567 away from 583, we end up with 16.
Append the next digit (7) from the dividend to 16 and continue with: 167 / 81

Going ahead to step 5:
167 divided by 81 is 2 with a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 972.0
The remainder is 5 after subtracting 162 from 167.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 81

Let's proceed to step 6:
53 divided by 81 is 0 with a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 9720.0
If we take 0 away from 53, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Moving on to step 7:
When dividing 530 by 81, we get 6 with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 9720.6
If we subtract 486 from 530, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 8:
440 divided by 81 is 5 with a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 9720.65
The remainder is 35 after subtracting 405 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 9:
81 can be fit into 350 4 times, resulting in a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 9720.654
Subtract 324 from 350 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 10:
If we divide 260 by 81, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 9720.6543
Subtracting 243 from 260 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 11:
When dividing 170 by 81, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 9720.65432
Subtract 162 from 170 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 12:
The number 81 fits into 80 0 times, leaving a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 9720.65432
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 13:
The number 81 fits into 800 9 times, leaving a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 9720.6543209
If we subtract 729 from 800, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 14:
The number 81 fits into 710 8 times, leaving a remainder of 62.
Record the quotient 8 as the next digit in the result. 
Result so far: 9720.65432098
The remainder is 62 after subtracting 648 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

The final outcome is 9720.65432098, with a leftover of 6.2e-08.