Task: Question Answering
Input (English): Problem: in a garden , there are 10 rows and 12 columns of mango trees . the distance between the two trees is 2 metres and a distance of four metre is left from all sides of the boundary of the garden . what is the length of the garden ? 
Options: a ) 22 , b ) 24 , c ) 26 , d ) 28 , e ) 30
Output (English): e