Task: Question Answering
Input (English): Problem: calculate the area of a triangle , if the sides of are 52 cm , 48 cm and 20 cm , what is its area ? 
Options: a ) 480 cm 2 , b ) 580 cm 2 , c ) 380 cm 2 , d ) 180 cm 2 , e ) 280 cm 2
Output (English): a