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

Input: Consider Input: Problem: how many integers between 324,700 and 458,600 have tens digit 1 and units digit 3 ?

Output: 1,33


Input: Consider Input: Problem: by selling an article for $ 195 , a person gains $ 45 . what is the gain % ?

Output: 30 %


Input: Consider Input: Problem: if 12 machine can finish a job in 40 days , then how many more machines would be needed to finish the job in one - fourth less time ?


Output: a . 4