import java.util.Scanner;

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

        double units = Double.parseDouble(scanner.nextLine());
        String startMeasuring = scanner.nextLine();
        String finalMeasuring = scanner.nextLine();
        double result = 0;

        if (startMeasuring.equals("m")) {
            if (finalMeasuring.equals("mm")) {
                result = units * 1000;
                System.out.printf("%.3f",result);
            } else {
                result = units * 100;
                System.out.printf("%.3f",result);
            }
        } else
        if (startMeasuring.equals("mm")) {
            if (finalMeasuring.equals("m")) {
                result = units * 0.001;
                System.out.printf("%.3f",result);
            } else {
                result = units * 0.1;
                System.out.printf("%.3f",result);
            }
        } else
        if (startMeasuring.equals("cm")) {
            if (finalMeasuring.equals("m")) {
                result = units * 0.01;
                System.out.printf ("%.3f", result);
            } else {
                result = units * 10;
                System.out.printf("%.3f",result);
            }
        }
    }
}