390379 divided by 80 
Our goal is to divide 390379 by 80.

On to step 1:
The number 80 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 80

Step 2:
39 divided by 80 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Fetch the next digit (0) from the dividend, attach it to 39 and continue: 390 / 80

Let's proceed to step 3:
When dividing 390 by 80, we get 4 with a remainder of 70.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 320 away from 390, we end up with 70.
Take the next digit (3) from the dividend and append it to 70, then repeat: 703 / 80

Advancing to step 4:
80 goes into 703 8 times with a remainder of 63.
The number 8 becomes the next digit in our result. 
Result so far: 48.0
If we subtract 640 from 703, we get 63.
Grab the next digit (7) from the dividend, add it to 63, then carry on: 637 / 80

On to step 5:
637 divided by 80 is 7 with a remainder of 77.
Put 7 as the next digit of the answer. 
Result so far: 487.0
The remainder is 77 after subtracting 560 from 637.
Fetch the next digit (9) from the dividend, attach it to 77 and continue: 779 / 80

Going ahead to step 6:
80 can be fit into 779 9 times, resulting in a remainder of 59.
Put 9 as the next digit of the answer. 
Result so far: 4879.0
If we take 720 away from 779, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 7:
80 can be fit into 590 7 times, resulting in a remainder of 30.
The number 7 becomes the next digit in our result. 
Result so far: 4879.7
Subtract 560 from 590 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
The number 80 fits into 300 3 times, leaving a remainder of 60.
The next digit of our result is 3. 
Result so far: 4879.73
The remainder is 60 after subtracting 240 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
80 goes into 600 7 times with a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 4879.737
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.

Moving on to step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 4879.7375
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.

Advancing to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4879.7375
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.

Moving on to step 12:
If we divide 0 by 80, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 4879.7375
Subtract 0 from 0 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.

The final result is 4879.7375 with a remainder of 0.0.