//Sample03_13.java
class Sample03_13 {
  public static void main(String[] args){

      System.out.println("HelloWorld!" + 1980 + 1980);
      System.out.println("HelloWorld!" + (1980 + 1980) );
      System.out.println("1980 + 1980 = " + (1980 + 1980) );

  }
}