420
GO CEILING!!! WHOOOHOOO!!!! YOUR NUMBER ONE!! YAY, CEILING RULES!!!
Because it's two gross! (A gross is a measurement unit for "144". So 2 * 144 = 288. Or "two gross".)
A sideways seven.
Because they'll reach 420 before anyone else. Explanation: 80 is quatre-vingt in french and quatre=4 and vingt= 20.