We're dividing 319391 by 2 
We want to divide 319391 by 2.

Step 1:
The number 2 fits into 3 1 times, leaving a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 1 after subtracting 2 from 3.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 2

Let's proceed to step 2:
2 can be fit into 11 5 times, resulting in a remainder of 1.
The next digit of our result is 5. 
Result so far: 15.0
If we subtract 10 from 11, we get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 2

Let's proceed to step 3:
If we divide 19 by 2, we get 9 and a remainder of 1.
The next digit of our result is 9. 
Result so far: 159.0
Subtracting 18 from 19 leaves us with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 2

Going ahead to step 4:
2 goes into 13 6 times with a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 1596.0
If we take 12 away from 13, we end up with 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 2

Advancing to step 5:
19 divided by 2 is 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 15969.0
Deduct 18 from 19 and we're left with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 2

Step 6:
When dividing 11 by 2, we get 5 with a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 159695.0
If we take 10 away from 11, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
2 can be fit into 10 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 159695.5
Deduct 10 from 10 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.

Moving on to step 8:
The number 2 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 159695.5
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.

Advancing to step 9:
2 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: 159695.5
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 159695.5, with a leftover of 0.0.