Task: Question Answering
Input (English): Problem: a room 14 m 21 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 ) 22636 , b ) 22640 , c ) 22647 , d ) 22533 , e ) 22675
Output (English): d