Given a rectangular (cuboidal for the puritans) cake with a rectangular piece removed (any size or orientation), how would you cut the remainder of the cake into two equal halves with one straight cut of a knife?
Given a rectangular (cuboidal for the puritans) cake with a rectangular piece removed (any size or orientation), how would you cut the remainder of the cake into two equal halves with one straight cut of a knife?
译：给定一块已在任意位置用任意方向切去一个矩形块的矩形蛋糕（注意是立体的，质量均匀的），怎样用一刀切出相等重量的两块来？