A lady builds 12cm length, 16cm width, and 6cm height box using 3cubic cm cubes. What is the minimum number of cubes required to build the box?  Choose the correct choice from the following answers.
A) 345  B) 384  C) 378  D) 398  E) 300

Rationale: "number of cubes required = volume of box / volume of cube = 12 * 16 * 6 / 3 = 384 cubes answer : b"
Answer: B