We're dividing 450148 by 2 
We want to figure out the number of times 450148 can be divided by 2.

Step 1:
When dividing 4 by 2, we get 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 4 from 4 leaves us with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 2

On to step 2:
2 goes into 5 2 times with a remainder of 1.
The next digit of our result is 2. 
Result so far: 22.0
Deduct 4 from 5 and we're left with 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 2

Going ahead to step 3:
10 divided by 2 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 225.0
Subtracting 10 from 10 leaves us with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 2

Advancing to step 4:
When dividing 1 by 2, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 2250.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 2

On to step 5:
When dividing 14 by 2, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 22507.0
Deduct 14 from 14 and we're left with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 2

Let's proceed to step 6:
8 divided by 2 is 4 with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 225074.0
Deduct 8 from 8 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.

On to step 7:
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: 225074.0
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.

Step 8:
The number 2 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 225074.0
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.

The final result is 225074.0 with a remainder of 0.0.