312337 ÷ 80 
Our goal is to divide 312337 by 80.

Let's proceed 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
Subtracting 0 from 3 leaves us with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 80

On to step 2:
80 goes into 31 0 times with a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Grab the next digit (2) from the dividend, add it to 31, then carry on: 312 / 80

On to step 3:
The number 80 fits into 312 3 times, leaving a remainder of 72.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 72 after subtracting 240 from 312.
Grab the next digit (3) from the dividend, add it to 72, then carry on: 723 / 80

Going ahead to step 4:
The number 80 fits into 723 9 times, leaving a remainder of 3.
The next digit of our result is 9. 
Result so far: 39.0
Deduct 720 from 723 and we're left with 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 80

Let's proceed to step 5:
33 divided by 80 is 0 with a remainder of 33.
Put 0 as the next digit of the answer. 
Result so far: 390.0
Subtracting 0 from 33 leaves us with 33.
Include the next digit (7) from the dividend after 33, then repeat: 337 / 80

Step 6:
337 divided by 80 is 4 with a remainder of 17.
Use 4 as the next digit of our solution. 
Result so far: 3904.0
If we subtract 320 from 337, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
80 can be fit into 170 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 3904.2
If we subtract 160 from 170, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
80 can be fit into 100 1 times, resulting in a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 3904.21
Subtracting 80 from 100 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
80 goes into 200 2 times with a remainder of 40.
The next digit of our result is 2. 
Result so far: 3904.212
Deduct 160 from 200 and we're left 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.

Advancing to step 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 3904.2125
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:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 3904.2125
If we take 0 away from 0, 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 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 3904.2125
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 3904.2125, with a leftover of 0.0.