class Box {
  double w = 0; //width
  double h = 0; //height
  double d = 0; //depth
  double v = 0; //volume

  void value(double w0, double h0, double d0) {
    w = w0;
    h = h0;
    d = d0;
  }

  double volume() {
    return w * h * d;
  }
}

public class Main {
  public static void main(String[] args) {
    double w1 = 10, h1 = 20, d1 = 40;
    Box Box1 = new Box();
    Box Box2 = new Box();
    Box1.value(w1, h1, d1);
    Box2.value(15, 20, 15); 
    System.out.println("Об'єм кобобки 1 " + Box1.volume());
    System.out.println("Об'єм кобобки 2 " + Box2.volume());
  }
}