MetricConverterFinal

import java.util.Scanner;

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

        double amount = Double.parseDouble(scanner.nextLine());
        String input = scanner.nextLine();
        String output = scanner.nextLine();

        if("m".equalsIgnoreCase(input)) {
            amount = amount;
        } else if("mm".equalsIgnoreCase(input)){
            amount = amount / 1000;
        } else if("cm".equalsIgnoreCase(input)) {
            amount = amount / 100;
        } else if("mi".equalsIgnoreCase(input)) {
            amount = amount / 0.000621371192;
        } else if("in".equalsIgnoreCase(input)) {
            amount = amount / 39.3700787;
        } else if("km".equalsIgnoreCase(input)) {
            amount = amount / 0.001;
        } else if("ft".equalsIgnoreCase(input)) {
            amount = amount / 3.2808399;
        } else if("yd".equalsIgnoreCase(input)) {
            amount= amount / 1.0936133;
        }

        if("m".equalsIgnoreCase(output)) {
            amount = amount;
        } else if("mm".equalsIgnoreCase(output)){
            amount = amount * 1000;
        } else if("cm".equalsIgnoreCase(output)) {
            amount = amount * 100;
        } else if("mi".equalsIgnoreCase(output)) {
            amount = amount * 0.000621371192;
        } else if("in".equalsIgnoreCase(output)) {
            amount = amount * 39.3700787;
        } else if("km".equalsIgnoreCase(output)) {
            amount = amount * 0.001;
        } else if("ft".equalsIgnoreCase(output)) {
            amount = amount * 3.2808399;
        } else if("yd".equalsIgnoreCase(output)) {
            amount= amount * 1.0936133;
        }

        System.out.printf("%.8f", amount);

    }
}