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

Input: Consider Input: Problem: in a certain country 1 / 5 of 8 = 4 . assuming the same proportion , what would be the value of 1 / 4 of 16 ?

Output: 10


Input: Consider Input: Problem: what is the sum of natural numbers between 30 and 100

Output: 4615


Input: Consider Input: Problem: a person purchases 90 clocks and sells 40 clocks at a gain of 10 % and 50 clocks at a gain of 20 % . if he sold all of them at a uniform profit of 15 % , then he would have got rs . 40 less . the cost price of each clock is :


Output: 80