Task: Question Answering
Input (English): Problem: in the faculty of reverse - engineering , 226 second year students study numeric methods , 450 second year students study automatic control of airborne vehicles and 134 second year students study them both . how many students are there in the faculty if the second year students are approximately 80 % of the total ? 
Options: a ) 515 . , b ) 678 . , c ) 618 . , d ) 644 . , e ) 666 .
Output (English): b