piece of cake
(muito fácil, “moleza”)
Our homework for last Wednesday was a piece of cake. = Nossa lição de casa para a última quarta foi muito fácil.
It makes the crisis of the early '80s [look like] a piece of cake compared to what's going on now. Things were difficult then, but you only had Chrysler on the brink of bankruptcy.
(Newsweek, April 30, 2009) = Faz com que a crise do começo dos anos 80 pareça uma “moleza” perto do que está acontecendo agora....