We're dividing 577209 by 80 
We want to divide 577209 by 80.

On to step 1:
The number 80 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 80

Let's proceed to step 2:
When dividing 57 by 80, we get 0 with a remainder of 57.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 57 leaves us with 57.
Append the next digit (7) from the dividend to 57 and continue with: 577 / 80

Going ahead to step 3:
When dividing 577 by 80, we get 7 with a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 560 from 577, we get 17.
Append the next digit (2) from the dividend to 17 and continue with: 172 / 80

Step 4:
80 can be fit into 172 2 times, resulting in a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 72.0
Deduct 160 from 172 and we're left with 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 80

Let's proceed to step 5:
The number 80 fits into 120 1 times, leaving a remainder of 40.
Use 1 as the next digit of our solution. 
Result so far: 721.0
Deduct 80 from 120 and we're left with 40.
Fetch the next digit (9) from the dividend, attach it to 40 and continue: 409 / 80

Advancing to step 6:
If we divide 409 by 80, we get 5 and a remainder of 9.
Record the quotient 5 as the next digit in the result. 
Result so far: 7215.0
Subtract 400 from 409 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
The number 80 fits into 90 1 times, leaving a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 7215.1
If we subtract 80 from 90, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
100 divided by 80 is 1 with a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 7215.11
Subtracting 80 from 100 leaves us 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.

After the division, we end up with 7215.11 and a remainder of 0.02.