We're dividing 86450861 by 2 
Let's see how many times 2 fits into 86450861.

On to step 1:
2 goes into 8 4 times with a remainder of 0.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 8 from 8 and we're left with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 2

Let's proceed to step 2:
If we divide 6 by 2, we get 3 and a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 43.0
If we take 6 away from 6, we end up with 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 2

Going ahead to step 3:
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: 432.0
If we take 4 away from 4, we end up with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 2

Step 4:
If we divide 5 by 2, we get 2 and a remainder of 1.
The next digit of our result is 2. 
Result so far: 4322.0
Subtract 4 from 5 to get 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 2

Going ahead to step 5:
When dividing 10 by 2, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 43225.0
Subtract 10 from 10 to get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 2

On to step 6:
2 can be fit into 8 4 times, resulting in a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 432254.0
If we take 8 away from 8, we end up with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 2

On to step 7:
The number 2 fits into 6 3 times, leaving a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 4322543.0
If we take 6 away from 6, we end up with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 2

Let's proceed to step 8:
The number 2 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 43225430.0
Subtracting 0 from 1 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.

On to step 9:
2 goes into 10 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 43225430.5
Subtract 10 from 10 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.

Let's proceed to step 10:
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: 43225430.5
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.

Going ahead to step 11:
2 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 43225430.5
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.

The final result is 43225430.5 with a remainder of 0.0.