using System;

public class Program

{

    public static void Main()

    {

        double depozit = double.Parse(Console.ReadLine());

        double srok =  double.Parse(Console.ReadLine());

        double lihva = double.Parse(Console.ReadLine());

        double suma = depozit + srok * ((depozit* (lihva / 100))/12); 

        Console.WriteLine(suma);

    }

}