Problem: how many cubes of 8 cm edge can be cut out of a cube of 16 cm edge
Rationale: "explanation : number of cubes = ( 16 x 16 x 16 ) / ( 8 x 8 x 8 ) = 8 answer : c"
annotated_formula: divide(volume_cube(16), volume_cube(divide(8, const_100)))