578621 divided by 80 
The aim is to understand the frequency of 80 in 578621.

Let's proceed to step 1:
If we divide 5 by 80, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 80

Advancing to step 2:
The number 80 fits into 57 0 times, leaving a remainder of 57.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Fetch the next digit (8) from the dividend, attach it to 57 and continue: 578 / 80

Let's proceed to step 3:
The number 80 fits into 578 7 times, leaving a remainder of 18.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 560 away from 578, we end up with 18.
Append the next digit (6) from the dividend to 18 and continue with: 186 / 80

Going ahead to step 4:
If we divide 186 by 80, we get 2 and a remainder of 26.
Put 2 as the next digit of the answer. 
Result so far: 72.0
If we subtract 160 from 186, we get 26.
Take the next digit (2) from the dividend and append it to 26, then repeat: 262 / 80

Step 5:
The number 80 fits into 262 3 times, leaving a remainder of 22.
Put 3 as the next digit of the answer. 
Result so far: 723.0
If we subtract 240 from 262, we get 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 80

On to step 6:
221 divided by 80 is 2 with a remainder of 61.
Write down 2 as next digit of the result. 
Result so far: 7232.0
Subtract 160 from 221 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 7:
80 goes into 610 7 times with a remainder of 50.
Put 7 as the next digit of the answer. 
Result so far: 7232.7
Deduct 560 from 610 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
80 goes into 500 6 times with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 7232.76
If we take 480 away from 500, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
80 goes into 200 2 times with a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 7232.762
The remainder is 40 after subtracting 160 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
80 goes into 400 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 7232.7625
The remainder is 0 after subtracting 400 from 400.
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.
Use 0 as the next digit of our solution. 
Result so far: 7232.7625
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.

Advancing to step 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 7232.7625
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.

Our division results in 7232.7625 with a remaining 0.0.