Task: Question Answering
Input (English): Problem: a box measuring 24 inches long by 40 inches wide by 16 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 ) 28 , b ) 30 , c ) 32 , d ) 35 , e ) 37
Output (English): b