import java.util.Scanner;

public class p18_Money {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int bitcoins = Integer.parseInt(scanner.nextLine());
        double chu = Double.parseDouble(scanner.nextLine());
        double commission = Double.parseDouble(scanner.nextLine());

        double n1 = bitcoins * 1168;
        double n2 = (chu * 1.76) * 0.15;
        double n3 = (n1 + n2) / 1.95;
        double n4 = n3 * (commission / 100);

        double result = n3 - n4;

        System.out.printf("%.2f", result);

    }
}