We look at the division of 979077 by 81 
The aim is to understand the frequency of 81 in 979077.

Let's proceed to step 1:
When dividing 9 by 81, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (7) from the dividend, attach it to 9 and continue: 97 / 81

On to step 2:
97 divided by 81 is 1 with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 81 away from 97, we end up with 16.
Append the next digit (9) from the dividend to 16 and continue with: 169 / 81

Advancing to step 3:
169 divided by 81 is 2 with a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 162 from 169 and we're left with 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 81

Going ahead to step 4:
70 divided by 81 is 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 120.0
Subtracting 0 from 70 leaves us with 70.
Append the next digit (7) from the dividend to 70 and continue with: 707 / 81

Step 5:
The number 81 fits into 707 8 times, leaving a remainder of 59.
Put 8 as the next digit of the answer. 
Result so far: 1208.0
If we subtract 648 from 707, we get 59.
Fetch the next digit (7) from the dividend, attach it to 59 and continue: 597 / 81

Advancing to step 6:
If we divide 597 by 81, we get 7 and a remainder of 30.
The next digit of our result is 7. 
Result so far: 12087.0
Deduct 567 from 597 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 7:
If we divide 300 by 81, we get 3 and a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 12087.3
Subtracting 243 from 300 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 8:
If we divide 570 by 81, we get 7 and a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 12087.37
Deduct 567 from 570 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 9:
81 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 12087.37
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
81 can be fit into 300 3 times, resulting in a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 12087.3703
Deduct 243 from 300 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 11:
570 divided by 81 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 12087.37037
Subtracting 567 from 570 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 12:
81 goes into 30 0 times with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 12087.37037
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 13:
81 goes into 300 3 times with a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 12087.3703703
Subtract 243 from 300 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Going ahead to step 14:
If we divide 570 by 81, we get 7 and a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 12087.37037037
If we take 567 away from 570, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final outcome is 12087.37037037, with a leftover of 3e-09.