for a cube 3x3x3
first and second cuts yield 3 pieces @ 3x3x1
now take each-one at time-and fold it over until the edges are flush (think foam rubber) and place one on top of the other and again with the third piece. The third cut (longwise)will yield 9 peices @ 3x1x1
repeat the fold over...
For an automobile, just open the drivers side door. For an aircraft, use your tools to open the inspection panel for the manufacturer's name plate and look for GVW (gross vehicle weight)