Generally, integers are easier to work with. But Ruby does some funny things when it comes to calculating integers.

If we don't explicitly tell Ruby to calculate with floats, it'll round any result down.

Yes! That's the result we're looking for.

Psst: only one of the numbers in this calculation needs to be a float for the result to be correct. Ruby automatically converts the other one.

Oh dear! That seems a bit wrong, doesn't it? That should be 1.6! Crazy Ruby.