503986 ÷ 2 
Let's see how many times 2 fits into 503986.

Moving on to step 1:
5 divided by 2 is 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 4 from 5 and we're left with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 2

Step 2:
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: 25.0
Subtracting 10 from 10 leaves us with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 2

Going ahead to step 3:
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: 251.0
Subtracting 2 from 3 leaves us with 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 2

Step 4:
When dividing 19 by 2, we get 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 2519.0
Subtract 18 from 19 to get 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 2

Advancing to step 5:
18 divided by 2 is 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 25199.0
If we take 18 away from 18, we end up with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 2

Moving on to step 6:
When dividing 6 by 2, we get 3 with a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 251993.0
If we take 6 away from 6, 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.

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: 251993.0
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.

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: 251993.0
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.

The final result is 251993.0 with a remainder of 0.0.