Task: Question Answering
Input (English): Problem: courtyard 3.78 meters long 5.95 meters wide is to be paved exactly with square tiles , all of the same size . what is the largest size of the tile which could be used for the purpose ? 
Options: a ) 22 , b ) 77 , c ) 877 , d ) 99 , e ) 88
Output (English): b