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

Input: Consider Input: Problem: a can do a work in 15 days and b in 20 days . if they work on it together for 5 days , then the fraction of the work that is left is

Output: 5 / 12


Input: Consider Input: Problem: the average of numbers 0.34204 , 0.34203 , 0.34202 and 0.34201 is ?

Output: 0.342025


Input: Consider Input: Problem: on the first of the year , james invested x dollars at proudstar bank in an account that yields 0.5 % in interest every quarter year . at the end of the year , during which he made no additional deposits or withdrawals , he had y dollars in the account . if james had invested the same amount in an account which pays interest on a yearly basis , what must the interest rate be for james to have y dollars at the end of the year ?


Output: 2.04 %