import java.io.*;
class StaticExample
{
	public static int width;
	public static int height;
	public static int length;

	public static void main(int width1, int height1, int length1) 
	{
		width= width1;
		height=height1;
		length=length1;
	}
	public int triangle()
	{
		return(width*height*length/2);
	}
	public static void main(String arg[])
	{
		try
		{
		StaticExample staticSum = new StaticExample();
		BufferedReader object= new BufferedReader(new InputStreamReader(System.in));
		System.out.println("Enter number");
		staticSum.width=Integer.parseInt(object.readLine());
		staticSum.height=Integer.parseInt(object.readLine());
		staticSum.length=Integer.parseInt(object.readLine());
		int i= staticSum.triangle();
		System.out.println("value is="+ staticSum.width);
		System.out.println("value is="+ staticSum.height);
		System.out.println("value is="+ staticSum.length);
		System.out.println("The values of triangle="+ i);
	}
	catch(Exception e){}
	}
}