Use consistent example for demonstrating integer vs. float division

I had to do a decent amount of mental math to figure out the old example (11 / 4 => 2).

This one (5 / 2 => 2) is easier, and makes the difference vs. float division (5.0 / 2.0 => 2.5) easier to spot.
Use consistent example for demonstrating integer vs. float division
Merge pull request #23 from brianr/patch-1

Use consistent example for demonstrating integer vs. float division