static void Main(string[] args)
{
Frete x = new Frete(double.Parse(Console.ReadLine()), double.Parse(Console.ReadLine()));
Console.WriteLine(x.CalcFrete());
FreteExpresso y = new FreteExpresso(double.Parse(Console.ReadLine()), double.Parse(Console.ReadLine()), double.Parse(Console.ReadLine()));
Console.WriteLine(y.CalcFrete());
}
