We're dividing 646649 by 2 
We want to divide 646649 by 2.

Going ahead to step 1:
6 divided by 2 is 3 with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 6 away from 6, we end up with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 2

On to step 2:
When dividing 4 by 2, we get 2 with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 32.0
If we subtract 4 from 4, we get 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 2

Going ahead to step 3:
When dividing 6 by 2, we get 3 with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 323.0
If we take 6 away from 6, we end up with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 2

On to step 4:
6 divided by 2 is 3 with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 3233.0
Subtract 6 from 6 to get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 2

Let's proceed to step 5:
If we divide 4 by 2, we get 2 and a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 32332.0
Subtract 4 from 4 to get 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 2

Advancing to step 6:
2 can be fit into 9 4 times, resulting in a remainder of 1.
The next digit of our result is 4. 
Result so far: 323324.0
Subtract 8 from 9 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
10 divided by 2 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 323324.5
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:
When dividing 0 by 2, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 323324.5
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.

Going ahead to step 9:
2 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 323324.5
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.

In conclusion, the division gives 323324.5 with a balance of 0.0.