well, in gonna go under the assumption that by scaled, you mean the length, height, and width have all be increased by a factor of five. the means the volume of my new object could be described as:
V = 5l × 5w × 5h
this can be rewritten as...
V = 125lwh
I know that lwh= original volume, which equals 64. SOO volume can now be rewritten as....
V = 64 (125) = 8000 m^3
if you scaled only length width or height by 5, you would only multiply those parts by 5. let me know of that makes sensr!