Task: Question Answering
Input (English): Problem: how many paying stones , each measuring 2 1 / 2 m * 2 m are required to pave a rectangular court yard 30 m long and 16 1 / 2 m board ? 
Options: a ) 90 , b ) 99 , c ) 97 , d ) 95 , e ) 65
Output (English): b