Task: Question Answering
Input (English): Problem: the compound interest on $ 27,000 at 11 % p . a is $ 11,000 . find out the period ( in years ) ? 
Options: a ) 2.5 , b ) 3 1 / 4 , c ) 3 , d ) 2 3 / 4 , e ) 4
Output (English): b