asd

public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int num = Integer.parseInt(scanner.nextLine());
        String textIn = scanner.nextLine();
        String textOut = scanner.nextLine();

        double m = 1;
        double cm = m / 1000;
        double mi = m / 0.000621371192;
        double in = m / 39.3700787;
        double km = m / 0.001;
        double ft = m / 3.2808399;
        double yd = m / 1.0936133;



        if (textIn.equals(cm) && textOut.equals(mi)) {

            double result = num * (cm * mi);
            System.out.printf("%.8f", result);