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

Ex Input:
Problem: in the manufacture of a certain product , 8 percent of the units produced are defective and 5 percent of the defective units are shipped for sale . what percent of the units produced are defective units that are shipped for sale ?

Ex Output:
0.4 %


Ex Input:
Problem: a certain rectangular crate measures 8 feet by 14 feet by 16 feet . a cylindrical gas tank is to be made for shipment in the crate and will stand upright when the crate is placed on one of its six faces . what should the radius of the tank be if it is to be of the largest possible volume ?

Ex Output:
6


Ex Input:
Problem: find the sum of divisors of 544 which are perfect squares .

Ex Output:

21