using System;

using System.Globalization;

​

public class Program

{   

    public static void Main()

    {

        string s1 = "2"; 

        string s2 = "25.00";

​

        double d1 = Convert.ToDouble(s1, CultureInfo.InvariantCulture);

        double d2 = Convert.ToDouble(s2, CultureInfo.InvariantCulture);

        double d3 = d2 * d1;

        Console.WriteLine(d3);

        double d4 = double.Parse(s1, CultureInfo.InvariantCulture);

        double d5 = double.Parse(s2, CultureInfo.InvariantCulture);

        double d6 = d4 * d5;

        Console.WriteLine(d6);

        float f1 = float.Parse(s1, CultureInfo.InvariantCulture);

        float f2 = float.Parse(s2, CultureInfo.InvariantCulture);

        float f3 = f2 * f1;

        Console.WriteLine(f3);

    }

}