import java.util.Scanner;

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

        double inputNumber = Double.parseDouble(scan.nextLine());
        String inputMetric = scan.nextLine();
        String outputMetric = scan.nextLine();

        switch (inputMetric) {
            case "mm":
                inputNumber = inputNumber / 1000;
                break;
            case "cm":
                inputNumber = inputNumber / 100;
                break;
            case  "m":
                break;
        }
        double outNumber = 0;
        switch (outputMetric) {
            case "mm":
                outNumber = inputNumber * 1000;
                break;
            case "cm":
                outNumber = inputNumber * 100;
                break;
            case "m":
                outNumber = inputNumber;
                break;
        }

        System.out.printf("%3.f", outNumber);
    }
}