A cube with side length 1 unit is called a unit cube
4 packs of bottled water (35*4=140)
7 packs of candy bars (20*7=140)
2x9 is 18x18 is 324 x28 is 9072 x 46 is 417,312 so the x 58 the answer is 24,204,096
No I do not know how to do this

I'm not sure if you need to simplify