import java.util.Scanner;
 
public class UnitConverter {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
 
        int choice;
        double value;
 
        System.out.println("===== UNIT CONVERTER =====");
        System.out.println("1. Kilometer to Mile");
        System.out.println("2. Mile to Kilometer");
        System.out.println("3. Centimeter to Inch");
        System.out.println("4. Inch to Centimeter");
        System.out.println("5. Meter to Feet");
        System.out.println("6. Feet to Meter");
        System.out.println("7. Kilogram to Pound");
        System.out.println("8. Pound to Kilogram");
        System.out.println("9. Exit");
 
        System.out.print("Enter your choice: ");
        choice = sc.nextInt();
 
        if (choice >= 1 && choice <= 8) {
            System.out.print("Enter value: ");
            value = sc.nextDouble();
        } else {
            System.out.println("Exiting...");
            return;
        }
 
        switch (choice) {
            case 1:
                System.out.println("Kilometer → Mile: " + (value * 0.621371));
                break;
 
            case 2:
                System.out.println("Mile → Kilometer: " + (value * 1.60934));
                break;
 
            case 3:
                System.out.println("Centimeter → Inch: " + (value * 0.393701));
                break;
 
            case 4:
                System.out.println("Inch → Centimeter: " + (value * 2.54));
                break;
 
            case 5:
                System.out.println("Meter → Feet: " + (value * 3.28084));
                break;
 
            case 6:
                System.out.println("Feet → Meter: " + (value * 0.3048));
                break;
 
            case 7:
                System.out.println("Kilogram → Pound: " + (value * 2.20462));
                break;
 
            case 8:
                System.out.println("Pound → Kilogram: " + (value * 0.453592));
                break;
 
            default:
                System.out.println("Invalid choice!");
        }
    }
}