Task: Question Answering
Input (English): Problem: find the value of 3.5 x [ ( 3.6 x 0.48 x 2.50 ) / ( 0.12 x 0.09 x 0.5 ) ] 
Options: a ) 800 , b ) 500 , c ) 2800 , d ) 1600 , e ) none
Output (English): c