//MAIN CLASS

import java.util.*;


public class SodaCanTest {

	private static double sodaCanSurfaceArea; 
	private static double sodaCanRadius;

   
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        
        SodaCan sodaCanObject = new SodaCan();
        
        System.out.println("enter a radius");
        sodaCanRadius = in.nextDouble();
		SodaCan.setSurfaceArea(sodaCanRadius);
        System.out.println("enter height");
        double sodaCanHeight = in.nextDouble();
        SodaCan.setVoulme(SodaCan.getSurfaceArea(), sodaCanHeight);
        System.out.println("answer is" + sodaCanObject.getVolume() );
    
    }
}

//OTHER CLASS

public class SodaCan {
private static double sodaCanSurfaceArea;
private static double sodaCanVolume;
private static double sodaCanRadius;
private static double sodaCanHeight;
public SodaCan(){
    sodaCanHeight=0;
    sodaCanRadius=0;
}
public static double getSurfaceArea(){
    return sodaCanSurfaceArea;
}
public static void setSurfaceArea(double sodaCanRadius){
    sodaCanSurfaceArea = sodaCanRadius * Math.PI;
}
public static double getVolume(){
return sodaCanVolume;
}
public static void setVoulme(double sodaCanSurfaceArea, double sodaCanHeight){
        sodaCanVolume = sodaCanSurfaceArea * sodaCanHeight;
}
}