154451 ÷ 2 
We want to figure out the number of times 154451 can be divided by 2.

Step 1:
1 divided by 2 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 2

Moving on to step 2:
2 goes into 15 7 times with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 7.0
The remainder is 1 after subtracting 14 from 15.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 2

Let's proceed to step 3:
When dividing 14 by 2, we get 7 with a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 77.0
Deduct 14 from 14 and we're left with 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 2

Advancing to step 4:
2 can be fit into 4 2 times, resulting in a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 772.0
The remainder is 0 after subtracting 4 from 4.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 2

Step 5:
2 can be fit into 5 2 times, resulting in a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 7722.0
Subtracting 4 from 5 leaves us with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 2

Let's proceed to step 6:
When dividing 11 by 2, we get 5 with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 77225.0
Subtracting 10 from 11 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.

Going ahead to step 7:
10 divided by 2 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 77225.5
If we subtract 10 from 10, 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.

On to step 8:
2 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 77225.5
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.

Let's proceed to step 9:
When dividing 0 by 2, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 77225.5
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 outcome is 77225.5, with a leftover of 0.0.