public class AutoBoxing {
  public static void main(String[] args) {

    Object[] w = new Object[2];
    
    Integer a = 3;
    Double b = 5.0;

    w[0] = a;
    w[1] = b;

    double x = 7 + 4 * a - b / 8;

    System.out.println(x);
  }
}