public static void Main()
Vector3 a = new Vector3(4, 2, 1);
Vector3 b = new Vector3(-3, 4, 5);
Vector3 c = new Vector3(2, 6, 4);
Vector3 d = new Vector3(-2, 3, -4);
Vector3 g = new Vector3(-1, 5, -2);
Console.WriteLine(c + b * 2);
Console.WriteLine(2 * a - c * 3);
Console.WriteLine(c / 2 + c - a * 2);
Console.WriteLine("Illegal operation");
Console.WriteLine(d + (a - b));
Console.WriteLine(d + 2 * (d + g));
Console.WriteLine((d + g) * 2);
Console.WriteLine(Vector3.Dot(a, b));
Console.WriteLine(a.Length());
Console.WriteLine(Vector3.Normalize(c));