Teacher: If I cut a beefsteak in half and then cut the half in half, what do I get?Tommy: Quarters.Teacher: And then if I cut it twice again?Tommy: Hamburger.

老師：如果我把一塊牛排切成兩半的兩半，我能得到幾塊兒？湯米：四塊。老師：那我要是再切兩次，我能得到什么呢？湯米：漢堡。