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

Input: Consider Input: Problem: what is the range of all the roots of | x ^ 2 - 4 | = x ?

Output: 3


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: a doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds . if the typical dosage is 4 cubic centimeters per 15 pounds of the body weight , by what percent was the prescribed dosage lesser than the typical dosage ?


Output: - 87.5