Task: Question Answering
Input (English): Problem: a courtyard is 25 meter long and 16 meter board is to be paved with bricks of dimensions 20 cm by 10 cm . the total number of bricks required is : 
Options: a ) 16000 , b ) 18000 , c ) 20000 , d ) 22000 , e ) none of these
Output (English): c