Task: Question Answering
Input (English): Problem: 12 buckets of water fill a tank when the capacity of each bucket is 49 litres . how many buckets will be needed to fill the same tank , if the capacity of each bucket is 7 litres ? 
Options: a ) 39 , b ) 84 , c ) 80 , d ) 82 , e ) 86
Output (English): b