using System;

public class Program

{

    public static void Main(string[] args)

    {

        Console.Write("Input number 1: ");

        int number1 = int.Parse(Console.ReadLine());

        Console.Write("Input number 2: ");

        int number2 = int.Parse(Console.ReadLine());

        Console.Write("Input operator: ");

        char mark =char.Parse(Console.ReadLine());

        Console.WriteLine();

        if (mark == '+')

        {

         Summation(number1,number2);    

        }

        else if (mark == '-')

        {

         Subtraction(number1,number2);  

        }

        else if (mark == '*' || mark == 'x')

        {

         Multiplication(number1,number2);   

        }

        else if (mark == '/')

        {

         Division(number1,number2); 

        }

        else

        {

         Console.WriteLine("Wrong operator...");    

        }

    }

    static void Summation(int num1,int num2)

    {

    Console.WriteLine("Answer of Summation is {0}",num1+num2);  

    }

    static void Subtraction(int num1,int num2)

    {

    Console.WriteLine("Subtraction of {0} and {1} is {2}",num1,num2,num1>num2?(num1-num2) :(num2 - num1));  

    }

    static void Multiplication(int num1,int num2)

    {

    Console.WriteLine("Answer of Multiplication is {0}",num1*num2); 

    }

    static void Division(int num1,int num2)

    {

        if (num2 == 0)

        {

            Console.WriteLine("Answer of Division is Error");

        }

        else

        {

            Console.WriteLine("Answer of Summation is {0:n2}",((double)num1/num2));

        }

    }

}