We're dividing 315928 by 80 
We're looking to find how many times 80 goes into 315928.

Advancing to step 1:
80 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 80

On to step 2:
The number 80 fits into 31 0 times, leaving a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Bring next digit (5) of the dividend behind the 31 and repeat the process: 315 / 80

On to step 3:
When dividing 315 by 80, we get 3 with a remainder of 75.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 240 from 315, we get 75.
Bring next digit (9) of the dividend behind the 75 and repeat the process: 759 / 80

On to step 4:
If we divide 759 by 80, we get 9 and a remainder of 39.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
Subtracting 720 from 759 leaves us with 39.
Take the next digit (2) from the dividend and append it to 39, then repeat: 392 / 80

Moving on to step 5:
The number 80 fits into 392 4 times, leaving a remainder of 72.
The number 4 becomes the next digit in our result. 
Result so far: 394.0
Deduct 320 from 392 and we're left with 72.
Fetch the next digit (8) from the dividend, attach it to 72 and continue: 728 / 80

Moving on to step 6:
80 can be fit into 728 9 times, resulting in a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 3949.0
Subtracting 720 from 728 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
80 divided by 80 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 3949.1
The remainder is 0 after subtracting 80 from 80.
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 8:
If we divide 0 by 80, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 3949.1
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.

Moving on to step 9:
80 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3949.1
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 3949.1, with a leftover of 0.0.