The problem of "how many things can be put in a package at most" usually involves the maximization of volume or surface area, which depends on the shape of the package and the size and shape of the items to be placed. If items of the same volume are required to be placed, the problem usually involves maximizing the packaging volume; If it is necessary to place items with the same surface area, the problem usually involves minimizing the surface area of the package. Therefore, when analyzing the problem in detail, it is necessary to judge whether the goal of solving is to maximize the volume or minimize the surface area according to the specific situation and requirements of the problem.