```package practice1;
import java.util.Scanner;
public class Xingxing{
public static void main(String[] args)
{
Scanner sc=new Scanner(System.in);//键盘输入球半径
double r=sc.nextDouble();
double v=0;
v=Math.PI*r*r*r*4/3;//体积公式
System.out.printf("%.2f",v);
}
}