static void Main(string[] args)
{
System.Console.WriteLine("5 + 12.3 = {0}", Calculator.sum(5, 12.3));
System.Console.WriteLine("63 - 13.5 = {0}", Calculator.minus(63, 13.5));
System.Console.WriteLine("13.2 / -2.35 = {0}", Calculator.divide(13.2, -2.35));
System.Console.WriteLine("-4.32 * 11.875 = {0}", Calculator.multiply(-4.32, 11.875));
System.Console.WriteLine("Thank you");
}