We're dividing 400989 by 2 
We want to figure out the number of times 400989 can be divided by 2.

Advancing to step 1:
If we divide 4 by 2, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 4 from 4 leaves us with 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 2

Advancing to step 2:
When dividing 0 by 2, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 20.0
If we subtract 0 from 0, we get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 2

Let's proceed to step 3:
0 divided by 2 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 200.0
Subtract 0 from 0 to get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 2

Going ahead to step 4:
If we divide 9 by 2, we get 4 and a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 2004.0
If we take 8 away from 9, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 2

Advancing to step 5:
2 can be fit into 18 9 times, resulting in a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 20049.0
Subtracting 18 from 18 leaves us with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 2

Moving on to step 6:
The number 2 fits into 9 4 times, leaving a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 200494.0
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.

Let's proceed to step 7:
10 divided by 2 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 200494.5
Subtracting 10 from 10 leaves us 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.

On to step 8:
When dividing 0 by 2, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 200494.5
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 next digit of our result is 0. 
Result so far: 200494.5
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.

Our division results in 200494.5 with a remaining 0.0.