Task: Question Answering
Input (English): Problem: a box measuring 36 inches long by 45 inches wide by 18 inches deep is to be filled entirely with identical cubes. no space is to be left unfilled. what is the smallest number of cubes that can accomplish this objective ?
Options: a. 32, b. 34, c. 38, d. 40, e. 42
Output (English): d