We're dividing 915890 by 2 
We want to figure out the number of times 915890 can be divided by 2.

Advancing to step 1:
2 goes into 9 4 times with a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 8 from 9, we get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 2

Moving on to step 2:
2 can be fit into 11 5 times, resulting in a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
If we subtract 10 from 11, we get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 2

On to step 3:
2 goes into 15 7 times with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 457.0
Deduct 14 from 15 and we're left with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 2

Going ahead to step 4:
If we divide 18 by 2, we get 9 and a remainder of 0.
The next digit of our result is 9. 
Result so far: 4579.0
If we subtract 18 from 18, we get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 2

Moving on to step 5:
The number 2 fits into 9 4 times, leaving a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 45794.0
Subtract 8 from 9 to get 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 2

Step 6:
10 divided by 2 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 457945.0
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.

Moving on to step 7:
If we divide 0 by 2, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 457945.0
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.

Step 8:
2 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 457945.0
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.

After the division, we end up with 457945.0 and a remainder of 0.0.