Solution A. Basic calculator. Several operations

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using System;
public class Exercise
{
    public static void Main()
    {
        Console.Write("Enter a number: ");
        int num1 = Convert.ToInt32(Console.ReadLine());
        int num2 = num1 + 1;

        Console.WriteLine("{0} + {1} = {2}", num1, num2, num1+num2);
        Console.WriteLine("{0} - {1} = {2}", num1, num2, num1-num2);
        Console.WriteLine("{0} x {1} = {2}", num1, num2, num1*num2);
        Console.WriteLine("{0} / {1} = {2}", num1, num2, num1/num2);
    }
}