We look at the division of 311515 by 80 
Our goal is to divide 311515 by 80.

On to step 1:
If we divide 3 by 80, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 80

Advancing to step 2:
80 goes into 31 0 times with a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 31, we end up with 31.
Include the next digit (1) from the dividend after 31, then repeat: 311 / 80

On to step 3:
The number 80 fits into 311 3 times, leaving a remainder of 71.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 71 after subtracting 240 from 311.
Bring next digit (5) of the dividend behind the 71 and repeat the process: 715 / 80

Let's proceed to step 4:
80 goes into 715 8 times with a remainder of 75.
Put 8 as the next digit of the answer. 
Result so far: 38.0
If we take 640 away from 715, we end up with 75.
Include the next digit (1) from the dividend after 75, then repeat: 751 / 80

On to step 5:
If we divide 751 by 80, we get 9 and a remainder of 31.
Use 9 as the next digit of our solution. 
Result so far: 389.0
Deduct 720 from 751 and we're left with 31.
Append the next digit (5) from the dividend to 31 and continue with: 315 / 80

Going ahead to step 6:
80 goes into 315 3 times with a remainder of 75.
The next digit of our result is 3. 
Result so far: 3893.0
Deduct 240 from 315 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 7:
750 divided by 80 is 9 with a remainder of 30.
The number 9 becomes the next digit in our result. 
Result so far: 3893.9
If we take 720 away from 750, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
If we divide 300 by 80, we get 3 and a remainder of 60.
Write down 3 as next digit of the result. 
Result so far: 3893.93
Subtracting 240 from 300 leaves us 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.

On to step 9:
If we divide 600 by 80, we get 7 and a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 3893.937
The remainder is 40 after subtracting 560 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 3893.9375
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.

Let's proceed to step 11:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 3893.9375
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.

On to step 12:
80 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 3893.9375
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 final outcome is 3893.9375, with a leftover of 0.0.