We're dividing 309518 by 2 
We're looking to find how many times 2 goes into 309518.

On to step 1:
The number 2 fits into 3 1 times, leaving a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 2 from 3, we get 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 2

Going ahead to step 2:
10 divided by 2 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 0 after subtracting 10 from 10.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 2

Going ahead to step 3:
If we divide 9 by 2, we get 4 and a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 154.0
The remainder is 1 after subtracting 8 from 9.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 2

Let's proceed to step 4:
If we divide 15 by 2, we get 7 and a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 1547.0
Subtracting 14 from 15 leaves us with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 2

Advancing to step 5:
If we divide 11 by 2, we get 5 and a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 15475.0
The remainder is 1 after subtracting 10 from 11.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 2

On to step 6:
When dividing 18 by 2, we get 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 154759.0
The remainder is 0 after subtracting 18 from 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
2 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 154759.0
Subtract 0 from 0 to 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 8:
If we divide 0 by 2, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 154759.0
Subtract 0 from 0 to 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.

After the division, we end up with 154759.0 and a remainder of 0.0.