The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: a work as fast as b . if b can complete a work in 8 days independently , the number of days in which a and b can together finish the work in ?
[EX A]: 2 2 / 3 days

[EX Q]: Problem: . 005 / ? = . 01
[EX A]: . 5

[EX Q]: Problem: the h . c . f . of two numbers is 20 and the other two factors of their l . c . m . are 13 and 14 . the larger of the two numbers is :
[EX A]:
280