Arithmetic Calculation using C#

using System;
public class addexam
{
public static void Main()
{
int a,b;
int add,sub,mul,div,mod;

Console.Write("Enter the First number : ");
a = Convert.ToInt32(Console.ReadLine());

Console.Write("Enter the Secondt number : ");
b = Convert.ToInt32(Console.ReadLine());

add = a+b;
sub = a-b;
mul = a*b;
div = a/b;
mod = a%b;

Console.WriteLine("Addition\t\t{0}", add);
Console.WriteLine("Subtraction\t\t{0}", sub);
Console.WriteLine("Multiplication\t\t{0}", mul);
Console.WriteLine("Division\t\t{0}", div);
Console.WriteLine("Modulus\t\t{0}", mod);
}
}