import java.util.Scanner;

public class Pr01Money {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        double bitcoins = Double.parseDouble(scan.nextLine());
        double yuans = Double.parseDouble(scan.nextLine());
        double commission = Double.parseDouble(scan.nextLine());

        double sum = bitcoins * 1168 + (yuans * 0.15 * 1.76);

        sum = (sum / 1.95) * (100 - commission) / 100;

        System.out.printf("%.12f",sum);
    }
}