using System;

public class Program

{

    public static void Main()

    {

        // https://dotnetfiddle.net/P7TESF

        Console.WriteLine("Area of a room:");

        Console.Write("Length: ");

        string number1Text = Console.ReadLine();

        // int is the integer type for whole numbers

        // need to convert input string to an integer

        int number1 = int.Parse(number1Text);

        Console.Write("Width: ");

        string number2Text = Console.ReadLine();

        int number2 = int.Parse(number2Text);

        int result = number1 * number2;

        Console.WriteLine("Sum is : " + result );

    } 

​

}