Task: Question Answering
Input (English): Problem: a hall 36 m long and 15 m broad is to be paved with stones , each measuring 2 dm by 5 dm . the number of stones required is : 
Options: ['a ) 180', 'b ) 1800', 'c ) 5400', 'd ) 18000', 'e ) 1.8']
Output (English): c