C# Online Compiler | .NET Fiddle

using System;

public class Program
{
	public static void Main()
	{
		Console.WriteLine($"Math.Pow(2, 10) = {Math.Pow(2, 10)}");
		Console.WriteLine($"Math.Sqrt(1024) = {Math.Sqrt(1024)}");
		Console.WriteLine($"Math.Round(10.12) = {Math.Round(10.12)}");
	}
}

----- Info for Nokia -----

Model - N 95
Manufacturer - Nokia
Price - 500
Owner - Maria
Batery type - Model: Batery, IdleTime: 20, TalkingH: 40, BatteryType: NiMH
Display - Screen size: 5, Screen colours: Blue

-----Info for Phone-----

Model - A70
Manufactirer - Samsung
Price - 800
Owner - Iva
Battery type - Model: Bat, IdleTime: 3, TalkingH: 10, BatteryType: NiCd
Display - Screen size: 6, Screen colours:

-----------//-----------

Model: Batr, IdleTime: 20, TalkingH: 50, BatteryType: LiIon

Screen size: 23, Screen colours: Some colours