Task: Question Answering
Input (English): Problem: a room 8 m 47 cm long and 7 m 77 cm broad is to be paved with square tiles . find the least number of square tiles required to cover the floor . 
Options: a ) 13636 , b ) 13440 , c ) 13647 , d ) 13431 , e ) 13675
Output (English): d