import java.util.Scanner;
import java.math.BigDecimal;
class Main{
public static void main(String[] args){
Scanner scan = new Scanner(System.in);

  double L = scan.nextInt();
    double M = L / 3;
  BigDecimal bd1 = new BigDecimal(M);
  BigDecimal bd2 = new BigDecimal(M);
  BigDecimal result1 = bd1.multiply(bd2);
  BigDecimal result2 = result1.multiply(bd1);
  
  System.out.println(result2);
  
 }
} import java.util.Scanner; Scanner java.util import java.math.BigDecimal; BigDecimal java.math class Main{
public static void main(String[] args){
Scanner scan = new Scanner(System.in);

  double L = scan.nextInt();
    double M = L / 3;
  BigDecimal bd1 = new BigDecimal(M);
  BigDecimal bd2 = new BigDecimal(M);
  BigDecimal result1 = bd1.multiply(bd2);
  BigDecimal result2 = result1.multiply(bd1);
  
  System.out.println(result2);
  
 }
} Main public static void main(String[] args){
Scanner scan = new Scanner(System.in);

  double L = scan.nextInt();
    double M = L / 3;
  BigDecimal bd1 = new BigDecimal(M);
  BigDecimal bd2 = new BigDecimal(M);
  BigDecimal result1 = bd1.multiply(bd2);
  BigDecimal result2 = result1.multiply(bd1);
  
  System.out.println(result2);
  
 } main {
Scanner scan = new Scanner(System.in);

  double L = scan.nextInt();
    double M = L / 3;
  BigDecimal bd1 = new BigDecimal(M);
  BigDecimal bd2 = new BigDecimal(M);
  BigDecimal result1 = bd1.multiply(bd2);
  BigDecimal result2 = result1.multiply(bd1);
  
  System.out.println(result2);
  
 } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) double L = scan.nextInt(); L scan.nextInt() scan.nextInt scan double M = L / 3; M L / 3 L 3 BigDecimal bd1 = new BigDecimal(M); bd1 new BigDecimal(M) BigDecimal bd2 = new BigDecimal(M); bd2 new BigDecimal(M) BigDecimal result1 = bd1.multiply(bd2); result1 bd1.multiply(bd2) bd1.multiply bd1 bd2 BigDecimal result2 = result1.multiply(bd1); result2 result1.multiply(bd1) result1.multiply result1 bd1 System.out.println(result2) System.out.println System.out System System.out result2 String[] args args
import java.util.Scanner;
import java.math.BigDecimal;
class Main{
public static void main(String[] args){
Scanner scan = new Scanner(System.in);

  double L = scan.nextInt();
    double M = L / 3;
  BigDecimal bd1 = new BigDecimal(M);
  BigDecimal bd2 = new BigDecimal(M);
  BigDecimal result1 = bd1.multiply(bd2);
  BigDecimal result2 = result1.multiply(bd1);
  
  System.out.println(result2);
  
 }
}