We look at the division of 639238 by 2 
Our goal is to divide 639238 by 2.

On to step 1:
6 divided by 2 is 3 with a remainder of 0.
The next digit of our result is 3. 
Result so far: 3.0
If we take 6 away from 6, we end up with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 2

Advancing to step 2:
2 goes into 3 1 times with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 31.0
Subtracting 2 from 3 leaves us with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 2

Going ahead to step 3:
2 can be fit into 19 9 times, resulting in a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 319.0
Subtract 18 from 19 to get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 2

Step 4:
12 divided by 2 is 6 with a remainder of 0.
The next digit of our result is 6. 
Result so far: 3196.0
Deduct 12 from 12 and we're left with 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 2

On to step 5:
When dividing 3 by 2, we get 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 31961.0
Deduct 2 from 3 and we're left with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 2

Moving on to step 6:
The number 2 fits into 18 9 times, leaving a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 319619.0
Subtract 18 from 18 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.

Step 7:
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: 319619.0
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 8:
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: 319619.0
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 319619.0, with a leftover of 0.0.