import java.util.Scanner;

public class MetricConverter {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double number = Double.parseDouble(scanner.nextLine());
        String input = scanner.nextLine();
        String output = scanner.nextLine();

        if (input.equals("mm")&& output.equals("m")){
            number = number / 1000;

        }
        else if (input.equals("mm")&& output.equals("cm")) {
            number = number / 10;
        }
        else if (input.equals("m")&& output.equals("mm")) {
            number = number * 1000;
        }
        else if (input.equals("m")&& output.equals("cm")) {
            number = number * 100;
        }
        else if (input.equals("cm")&& output.equals("m")) {
            number = number / 100;
        }
        else if (input.equals("cm")&& output.equals("mm")) {
            number = number * 10;
        }
        System.out.printf("%.3f",number);
    }
}