/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Matematyka2
{
	public static double mnoznik = 3.0;
	public static double oblicz(double x, double y) {
		return (x + y) * mnoznik;
	}
}
 
class Test
{
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.println(Matematyka2.mnoznik);
		System.out.println(Matematyka2.oblicz(4.0, 2.0));
	}
}

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