MetricConverter_04

import java.util.Scanner;

public class MetricConverter_04 {
    public static void main(String[] args) {
        Scanner myScan = new Scanner(System.in);

        // converting m <-> mm <-> cm <-> m

        double number = Double.parseDouble(myScan.nextLine());
        String convertFrom = myScan.nextLine();
        String convertTo = myScan.nextLine();

        double numberInMetres = 0;
        double numberInCentimetres = 0;
        double numberInMillimetres = 0;

        if (convertFrom.equals("m")) {
            numberInCentimetres = number * 100;
            numberInMillimetres = number * 1000;
        } else if (convertFrom.equals("cm")) {
            numberInMetres = number / 100;
            numberInMillimetres = number * 10;
        } else if (convertFrom.equals("mm")) {
            numberInMetres = number / 1000;
            numberInCentimetres = number / 10;
        }
        if (convertTo.equals("m")) {
            System.out.printf("%.3f", numberInMetres);
        } else if (convertTo.equals("cm")) {
            System.out.printf("%.3f", numberInCentimetres);

        } else if (convertTo.equals("mm")) {
            System.out.printf("%.3f", numberInMillimetres);
        }

    }
}