We look at the division of 318439 by 80 
We're looking to find how many times 80 goes into 318439.

Let's proceed to step 1:
When dividing 3 by 80, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 80

Step 2:
If we divide 31 by 80, we get 0 and a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 31 and we're left with 31.
Bring next digit (8) of the dividend behind the 31 and repeat the process: 318 / 80

Going ahead to step 3:
318 divided by 80 is 3 with a remainder of 78.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 240 from 318 and we're left with 78.
Fetch the next digit (4) from the dividend, attach it to 78 and continue: 784 / 80

Let's proceed to step 4:
80 can be fit into 784 9 times, resulting in a remainder of 64.
Put 9 as the next digit of the answer. 
Result so far: 39.0
The remainder is 64 after subtracting 720 from 784.
Include the next digit (3) from the dividend after 64, then repeat: 643 / 80

Advancing to step 5:
80 goes into 643 8 times with a remainder of 3.
The next digit of our result is 8. 
Result so far: 398.0
Subtracting 640 from 643 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 80

Moving on to step 6:
80 can be fit into 39 0 times, resulting in a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 3980.0
If we subtract 0 from 39, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 7:
The number 80 fits into 390 4 times, leaving a remainder of 70.
Write down 4 as next digit of the result. 
Result so far: 3980.4
If we subtract 320 from 390, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
When dividing 700 by 80, we get 8 with a remainder of 60.
Put 8 as the next digit of the answer. 
Result so far: 3980.48
Deduct 640 from 700 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
If we divide 600 by 80, we get 7 and a remainder of 40.
The next digit of our result is 7. 
Result so far: 3980.487
Subtracting 560 from 600 leaves us 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 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 3980.4875
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.

On to step 11:
0 divided by 80 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3980.4875
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.

Going ahead to step 12:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3980.4875
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 quotient of the division is 3980.4875, and the remainder is 0.0.