439580 ÷ 80 
We want to divide 439580 by 80.

On to step 1:
80 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 80

Let's proceed to step 2:
The number 80 fits into 43 0 times, leaving a remainder of 43.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Grab the next digit (9) from the dividend, add it to 43, then carry on: 439 / 80

Step 3:
80 can be fit into 439 5 times, resulting in a remainder of 39.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 39 after subtracting 400 from 439.
Include the next digit (5) from the dividend after 39, then repeat: 395 / 80

Moving on to step 4:
80 goes into 395 4 times with a remainder of 75.
Record the quotient 4 as the next digit in the result. 
Result so far: 54.0
If we subtract 320 from 395, we get 75.
Take the next digit (8) from the dividend and append it to 75, then repeat: 758 / 80

On to step 5:
If we divide 758 by 80, we get 9 and a remainder of 38.
Put 9 as the next digit of the answer. 
Result so far: 549.0
If we subtract 720 from 758, we get 38.
Append the next digit (0) from the dividend to 38 and continue with: 380 / 80

Moving on to step 6:
380 divided by 80 is 4 with a remainder of 60.
The number 4 becomes the next digit in our result. 
Result so far: 5494.0
The remainder is 60 after subtracting 320 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 7:
80 can be fit into 600 7 times, resulting in a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 5494.7
If we take 560 away from 600, 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.

Going ahead to step 8:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 5494.75
If we take 400 away from 400, 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.

Going ahead to step 9:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5494.75
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.

Let's proceed 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: 5494.75
Deduct 0 from 0 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.

The quotient of the division is 5494.75, and the remainder is 0.0.