Task: Question Answering
Input (English): Problem: the ratio of the volumes of two cubes is 729 : 2197 . what is the ratio of their total surface areas ? 
Options: a ) 81 : 169 , b ) 81 : 122 , c ) 81 : 124 , d ) 81 : 126 , e ) 81 : 129
Output (English): a