We're dividing 780540 by 81 
The aim is to understand the frequency of 81 in 780540.

Let's proceed to step 1:
81 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 81

Going ahead to step 2:
If we divide 78 by 81, we get 0 and a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Grab the next digit (0) from the dividend, add it to 78, then carry on: 780 / 81

Going ahead to step 3:
81 can be fit into 780 9 times, resulting in a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 51 after subtracting 729 from 780.
Include the next digit (5) from the dividend after 51, then repeat: 515 / 81

Let's proceed to step 4:
The number 81 fits into 515 6 times, leaving a remainder of 29.
Use 6 as the next digit of our solution. 
Result so far: 96.0
If we take 486 away from 515, we end up with 29.
Fetch the next digit (4) from the dividend, attach it to 29 and continue: 294 / 81

Advancing to step 5:
If we divide 294 by 81, we get 3 and a remainder of 51.
The number 3 becomes the next digit in our result. 
Result so far: 963.0
If we subtract 243 from 294, we get 51.
Take the next digit (0) from the dividend and append it to 51, then repeat: 510 / 81

Moving on to step 6:
The number 81 fits into 510 6 times, leaving a remainder of 24.
The next digit of our result is 6. 
Result so far: 9636.0
Subtracting 486 from 510 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 7:
81 goes into 240 2 times with a remainder of 78.
Use 2 as the next digit of our solution. 
Result so far: 9636.2
Subtract 162 from 240 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 8:
780 divided by 81 is 9 with a remainder of 51.
The next digit of our result is 9. 
Result so far: 9636.29
Subtracting 729 from 780 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 9:
510 divided by 81 is 6 with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 9636.296
Deduct 486 from 510 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 10:
81 goes into 240 2 times with a remainder of 78.
Write down 2 as next digit of the result. 
Result so far: 9636.2962
If we take 162 away from 240, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 11:
81 goes into 780 9 times with a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 9636.29629
If we take 729 away from 780, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 12:
510 divided by 81 is 6 with a remainder of 24.
The number 6 becomes the next digit in our result. 
Result so far: 9636.296296
Subtract 486 from 510 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 13:
If we divide 240 by 81, we get 2 and a remainder of 78.
Write down 2 as next digit of the result. 
Result so far: 9636.2962962
The remainder is 78 after subtracting 162 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 14:
81 can be fit into 780 9 times, resulting in a remainder of 51.
The next digit of our result is 9. 
Result so far: 9636.29629629
If we subtract 729 from 780, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

The quotient of the division is 9636.29629629, and the remainder is 5.1e-08.