class Planet {

   private  String name;
   private  double  diameter;

   public Planet() {
         name = "";
         diameter = 0.0;
      }

   public Planet (String  p , double d) {
         name = p;
         diameter = d;
      }

   public String getName() {
          return  name;
      }
   public double getDia() {
          return  diameter;
      } 
}    




public class Hello {
    public static final double PI = 22/7;

    public static void main(String[] args) 
      {
        Planet  earth  =  new Planet("Earth",7926.41);
        System.out.print( "hello " + earth.getName());
        System.out.println( " your circumference is " + (PI * earth.getDia()) + " miles");
      }
}