using System;

​

public class Program

{

    static private double area(double a, double b)

    {

        return a*b;

    }

​

    public static void Main()

    {

        start:

            double input1 = double.Parse(Console.ReadLine());

        double input2 = double.Parse(Console.ReadLine());

        double output = area(input1, input2);

        Console.WriteLine(output);

        goto start;

    }

}