using System;

public class Program

{

    static private double area(double l, double w)

    {

        double sum = l * w;

        return sum;

    }

    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;

    }

}