The volume of a cube depends on the length of its sides. this can be written in function notation as v(s). what is the best interpretation of v(2) = 8?

What is the best interpretation of v(2) = 8?

v(s) = a³ , a being the side of the cube and v, the volume. Moreover 
the sub s in v(s) gives the length of the side "a":

v(s) = a³
v(2) = 8 → v(2) = 2³  → v(2) = 8 

Depends by how many apples are in a case