import java.util.Scanner;

public class Ex1 
{
   public static void  main(String[] arg) 
   {
       int year, month, day;                    //(1)
       Scanner scan = new Scanner(System.in);   //(2)

       System.out.println("Hur gammal är du? ");//(3)
       year = scan.nextInt();                   //(4)
       month = year*12;                         //(5)
       ...                                      //(6)
       System.out.println("Du är " + month + "...  //(7)
                                         

   }
}