I gotchu.
So if the number you have to divide is smaller than the thing you are dividing by, it can be a little confusing.
So let's just work through an example.
2÷5
Now, 2 is (obviously) smaller than 5, but you still have to divide it.
So, 2 is the same as 2.0, so you can just pretend that 2 is 20 and divide 20 by 5. You would get 4. But, that is not yet the answer. So if you had 2.0 ÷5, you would put 0 over the 2, and and put . after it, then you are dividing 20 by 5, which is 4. But, if you look, you would have 0.4. That is the answer.
I hope this made sense, I am on a phone so i can't show exactly how to do it.
-cuberdude
