We divide 801589 by 2
We're looking to find how many times 2 goes into 801589.

On to step 1:
8 divided by 2 is 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 8 from 8 and we're left with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 2

Step 2:
If we divide 0 by 2, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 40.0
If we subtract 0 from 0, we get 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 2

Step 3:
When dividing 1 by 2, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 400.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 2

Step 4:
If we divide 15 by 2, we get 7 and a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 4007.0
The remainder is 1 after subtracting 14 from 15.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 2

Moving on to step 5:
When dividing 18 by 2, we get 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 40079.0
The remainder is 0 after subtracting 18 from 18.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 2

Let's proceed to step 6:
2 goes into 9 4 times with a remainder of 1.
The next digit of our result is 4. 
Result so far: 400794.0
Subtracting 8 from 9 leaves us 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.

Step 7:
2 can be fit into 10 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 400794.5
If we take 10 away from 10, 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.

Moving on to step 8:
The number 2 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 400794.5
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.

Moving on to step 9:
When dividing 0 by 2, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 400794.5
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 result is 400794.5 with a remainder of 0.0.