A Rhyme To Remember Your Roman Numerals

The Super Bowl is probably the one time of year when any of us bother to pay attention to roman numerals. This year it's 46, otherwise written as XLVI. Just can't keep your numerals straight? Ian Chillag and Michael Danforth of NPR's podcast How Do You Do That explain the subtleties of Roman Numerals for the watchers of Super Bowl XLVI.