Let's divide 439904 by 80
We want to figure out the number of times 439904 can be divided by 80.

Going ahead to step 1:
80 goes into 4 0 times with 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.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 80

On to step 2:
80 can be fit into 43 0 times, resulting in a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Take the next digit (9) from the dividend and append it to 43, then repeat: 439 / 80

Moving on to step 3:
The number 80 fits into 439 5 times, leaving a remainder of 39.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we take 400 away from 439, we end up with 39.
Append the next digit (9) from the dividend to 39 and continue with: 399 / 80

Going ahead to step 4:
80 goes into 399 4 times with a remainder of 79.
The number 4 becomes the next digit in our result. 
Result so far: 54.0
If we subtract 320 from 399, we get 79.
Include the next digit (0) from the dividend after 79, then repeat: 790 / 80

Going ahead to step 5:
The number 80 fits into 790 9 times, leaving a remainder of 70.
Use 9 as the next digit of our solution. 
Result so far: 549.0
Deduct 720 from 790 and we're left with 70.
Grab the next digit (4) from the dividend, add it to 70, then carry on: 704 / 80

Step 6:
The number 80 fits into 704 8 times, leaving a remainder of 64.
The next digit of our result is 8. 
Result so far: 5498.0
Deduct 640 from 704 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 7:
The number 80 fits into 640 8 times, leaving a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 5498.8
Subtract 640 from 640 to 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.

Advancing to step 8:
80 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5498.8
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.

On to step 9:
If we divide 0 by 80, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5498.8
The remainder is 0 after subtracting 0 from 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 5498.8, and the remainder is 0.0.