import java.io.*;
import java.text.*;

public class acres2ha 
{
	static final double FACTOR =2.47;

	public static void main(String args[])throws IOException
	{
		double acres=0.0;

		BufferedReader in=new BufferedReader
		(new InputStreamReader(System.in));

                System.out.print("Please enter the number of acres: ");
		acres=Double.valueOf(in.readLine().trim()).doubleValue();
		getHectares(acres);
	}
	public static void getHectares(double acres)
	{
		double hectares=acres/FACTOR;
		System.out.println(acres+" = "+hectares+" hectares.");
	}

}