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

Input: Consider Input: Problem: there are 2 red chips and 3 blue ones . when arranged in a row , they form a certain color pattern , for example rbrrb . how many color patterns ?

Output: e ) 10


Input: Consider Input: Problem: 20 is subtracted from 80 % of a number , the result is 60 . find the number ?

Output: 100


Input: Consider Input: Problem: there are 250 doctors and nurses at a hospital . if the ratio of doctors to nurses is 2 to 3 , how many nurses are at the hospital ?


Output: 15