import java.util.Scanner;
import java.util.*;
public class Main
{
    public static void main(String[] args)
    {
        Scanner sc=new Scanner(System.in);
        double inches=sc.nextDouble();
        double meters;
    }
    public static double convertinchestometers(double inches)
    {
        meters=inches*0.0254;
        return meters;
    }
}