Because we need to know that the closer to the cube, the smaller its surface area ~

In other words, the closer we are to the cube, the smaller the paper material of the box ~

I won't explain the reason here, I will know it when I go to high school ~

There are four types of * * * 2 * 3, 1*3*4, 1*2*6,1*12, and each type has three styles (that is, three orientations of soap).

So there are 4 * * * 3 = 12 swings.

Nearest cube arranged in 2*2*3.

Then, the most economical arrangement of the 12 block is: a cuboid with a length of 2*9= 18, a width of 2*5= 10 and a height of 3*4= 12 is the most economical!

Surface area = 2 * (18 *10+12+12 *18) = 2 * (180+/)