604400 ÷ 80 
We want to figure out the number of times 604400 can be divided by 80.

Advancing to step 1:
80 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (0) from the dividend and append it to 6, then repeat: 60 / 80

Advancing to step 2:
When dividing 60 by 80, we get 0 with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 60 leaves us with 60.
Grab the next digit (4) from the dividend, add it to 60, then carry on: 604 / 80

Step 3:
80 can be fit into 604 7 times, resulting in a remainder of 44.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtract 560 from 604 to get 44.
Take the next digit (4) from the dividend and append it to 44, then repeat: 444 / 80

Going ahead to step 4:
444 divided by 80 is 5 with a remainder of 44.
Write down 5 as next digit of the result. 
Result so far: 75.0
The remainder is 44 after subtracting 400 from 444.
Fetch the next digit (0) from the dividend, attach it to 44 and continue: 440 / 80

On to step 5:
If we divide 440 by 80, we get 5 and a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 755.0
Deduct 400 from 440 and we're left with 40.
Grab the next digit (0) from the dividend, add it to 40, then carry on: 400 / 80

On to step 6:
400 divided by 80 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 7555.0
Deduct 400 from 400 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 7:
80 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 7555.0
If we subtract 0 from 0, 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.

Going ahead to step 8:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 7555.0
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.

The final outcome is 7555.0, with a leftover of 0.0.