We divide 865583 by 2
We want to divide 865583 by 2.

On to step 1:
If we divide 8 by 2, we get 4 and a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 8 from 8, we get 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 2

Step 2:
When dividing 6 by 2, we get 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
Subtract 6 from 6 to get 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 2

Step 3:
2 can be fit into 5 2 times, resulting in a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 432.0
Deduct 4 from 5 and we're left with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 2

Advancing to step 4:
If we divide 15 by 2, we get 7 and a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 4327.0
Subtracting 14 from 15 leaves us with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 2

On to step 5:
2 can be fit into 18 9 times, resulting in a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 43279.0
If we subtract 18 from 18, we get 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 2

Step 6:
3 divided by 2 is 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 432791.0
The remainder is 1 after subtracting 2 from 3.
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 goes into 10 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 432791.5
The remainder is 0 after subtracting 10 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead 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: 432791.5
The remainder is 0 after subtracting 0 from 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 9:
If we divide 0 by 2, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 432791.5
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.

The final result is 432791.5 with a remainder of 0.0.