using System;

public class Program

{

    public static void Main()

    {

        int BTC=int.Parse(Console.ReadLine());

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

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

        double result=(((BTC*1168/1.95)+(China*0.15*1.76/1.95))-((BTC*1168/1.95)+(China*0.15*1.76/1.95))*comisionna/100);

        Console.WriteLine(Math.Round(result,2));

    }

}