using System;

​

public class Program

{

    static private double area(double a, double b)

    {

        double area = a * b;

        return a * b;

    }

​

    public static void Main()

    {

        start:

            double length = double.Parse(Console.ReadLine());

        double width = double.Parse(Console.ReadLine());

        Console.WriteLine(area(length, width));

        goto start;

    }

​

    static private double area(double a, double b)

    {

        return a * b;

    }

}