Let's divide 645572 by 80
The aim is to understand the frequency of 80 in 645572.

Let's proceed to step 1:
The number 80 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 80

On to step 2:
The number 80 fits into 64 0 times, leaving a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Fetch the next digit (5) from the dividend, attach it to 64 and continue: 645 / 80

Advancing to step 3:
80 goes into 645 8 times with a remainder of 5.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 640 away from 645, we end up with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 80

Let's proceed to step 4:
The number 80 fits into 55 0 times, leaving a remainder of 55.
Write down 0 as next digit of the result. 
Result so far: 80.0
The remainder is 55 after subtracting 0 from 55.
Append the next digit (7) from the dividend to 55 and continue with: 557 / 80

Advancing to step 5:
The number 80 fits into 557 6 times, leaving a remainder of 77.
Use 6 as the next digit of our solution. 
Result so far: 806.0
Subtracting 480 from 557 leaves us with 77.
Grab the next digit (2) from the dividend, add it to 77, then carry on: 772 / 80

Moving on to step 6:
When dividing 772 by 80, we get 9 with a remainder of 52.
Put 9 as the next digit of the answer. 
Result so far: 8069.0
If we subtract 720 from 772, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 7:
80 goes into 520 6 times with a remainder of 40.
Use 6 as the next digit of our solution. 
Result so far: 8069.6
If we take 480 away from 520, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 8:
When dividing 400 by 80, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 8069.65
If we subtract 400 from 400, we 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.

Let's proceed to step 9:
If we divide 0 by 80, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 8069.65
Subtracting 0 from 0 leaves us 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.

On to step 10:
If we divide 0 by 80, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8069.65
Subtracting 0 from 0 leaves us 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.

In conclusion, the division gives 8069.65 with a balance of 0.0.