990251 ÷ 2 
Our goal is to divide 990251 by 2.

On to step 1:
2 can be fit into 9 4 times, resulting in a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 1 after subtracting 8 from 9.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 2

Moving on to step 2:
19 divided by 2 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
If we subtract 18 from 19, we get 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 2

On to step 3:
The number 2 fits into 10 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 495.0
Subtract 10 from 10 to get 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 2

Moving on to step 4:
2 goes into 2 1 times with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 4951.0
Deduct 2 from 2 and we're left with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 2

On to step 5:
2 goes into 5 2 times with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 49512.0
Subtracting 4 from 5 leaves us with 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 2

Advancing to step 6:
2 can be fit into 11 5 times, resulting in a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 495125.0
Deduct 10 from 11 and we're left 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.

Step 7:
The number 2 fits into 10 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 495125.5
The remainder is 0 after subtracting 10 from 10.
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 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: 495125.5
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.

Let's proceed to step 9:
2 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 495125.5
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 outcome is 495125.5, with a leftover of 0.0.