We divide 850398 by 2
We're looking to find how many times 2 goes into 850398.

Moving on to step 1:
The number 2 fits into 8 4 times, leaving a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 8 from 8 leaves us with 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 2

Going ahead to step 2:
When dividing 5 by 2, we get 2 with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we subtract 4 from 5, we get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 2

Going ahead to step 3:
When dividing 10 by 2, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 425.0
Subtracting 10 from 10 leaves us with 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 2

Advancing to step 4:
When dividing 3 by 2, we get 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 4251.0
If we subtract 2 from 3, we get 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 2

Going ahead to step 5:
When dividing 19 by 2, we get 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 42519.0
If we take 18 away from 19, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 2

Let's proceed to step 6:
18 divided by 2 is 9 with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 425199.0
Subtract 18 from 18 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.

Advancing to step 7:
0 divided by 2 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 425199.0
The remainder is 0 after subtracting 0 from 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 8:
0 divided by 2 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 425199.0
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.

The final outcome is 425199.0, with a leftover of 0.0.