66486056 divided by 80 
The aim is to understand the frequency of 80 in 66486056.

Going ahead to step 1:
6 divided by 80 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 80

Moving on to step 2:
When dividing 66 by 80, we get 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Include the next digit (4) from the dividend after 66, then repeat: 664 / 80

Moving on to step 3:
If we divide 664 by 80, we get 8 and a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Deduct 640 from 664 and we're left with 24.
Take the next digit (8) from the dividend and append it to 24, then repeat: 248 / 80

Going ahead to step 4:
80 goes into 248 3 times with a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
Subtract 240 from 248 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 80

Step 5:
The number 80 fits into 86 1 times, leaving a remainder of 6.
Put 1 as the next digit of the answer. 
Result so far: 831.0
The remainder is 6 after subtracting 80 from 86.
Include the next digit (0) from the dividend after 6, then repeat: 60 / 80

Advancing to step 6:
The number 80 fits into 60 0 times, leaving a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 8310.0
Subtract 0 from 60 to get 60.
Bring next digit (5) of the dividend behind the 60 and repeat the process: 605 / 80

On to step 7:
80 can be fit into 605 7 times, resulting in a remainder of 45.
The next digit of our result is 7. 
Result so far: 83107.0
Subtract 560 from 605 to get 45.
Fetch the next digit (6) from the dividend, attach it to 45 and continue: 456 / 80

On to step 8:
80 can be fit into 456 5 times, resulting in a remainder of 56.
The number 5 becomes the next digit in our result. 
Result so far: 831075.0
Deduct 400 from 456 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 9:
80 goes into 560 7 times with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 831075.7
Deduct 560 from 560 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 831075.7
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 831075.7
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 831075.7 with a remaining 0.0.