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

Input: Consider Input: 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 ?

Output: 2 2 / 3 days

Input: Consider Input: Problem: from a pack of cards , two cards are drawn one after the other , with replacement . what is the probability that the first card is a black card and the second card is a king ?

Output: 1 / 26

Input: Consider Input: Problem: the mean of 50 observations was 36 . it was found later an observation 48 was wrongly taken as 23 . the corrected new means is :
Output: 36.5