class Sphere {
    double radius;
    Sphere( double r ){
        radius = r;
    }
    double calcVol(){
        return 4.0*Math.PI*radius*radius*radius/3.0;
    }
}
 
 
class Star extends Sphere {
 
    private String name;
    private String englishName;
 
    Star(double r, String name, String englishName) {
        super(r);
        this.name = name;
        this.englishName = englishName;
    }
 
    public String showName() {
        return this.name;
    }
 
    public void explainStar() {
        System.out.println("太陽は英語で”" + englishName + "”と呼びます。");
    }
}
 
 
class Space {
    public static void main(String [] args){
        Star s = new Star(696010.0, "太陽", "Sun");
        double v = s.calcVol();
        System.out.printf("%sの体積は%.1e立方kmです。¥n", s.showName(), v);
        s.explainStar();
    }
}
 

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