11. Math operations

using System;

namespace _11._Math_operations
{
    class Program
    {
        static void Main(string[] args)
        {
            double firstNumber =double.Parse(Console.ReadLine());
            char @operator = char.Parse(Console.ReadLine());
            double secondNumber = double.Parse(Console.ReadLine());
            double result = 0;


            switch(@operator)
            {
                case '+':
                    result = Add(firstNumber, secondNumber);
                    break;
                case '-':
                    result = Subtract(firstNumber, secondNumber);
                    break;
                case '*':
                    result = Multiply(firstNumber, secondNumber);
                    break;
                case '/':
                    result = Divide(firstNumber, secondNumber);
                    break;
            }

            Console.WriteLine(result);
        }

        static double Add(double firstNumber, double secondNumber)
        {
            return firstNumber + secondNumber;
        }
        static double Subtract(double firstNumber, double secondNumber)
        {
            return firstNumber - secondNumber;
        }
        static double Multiply(double firstNumber, double secondNumber)
        {
            return firstNumber * secondNumber;
        }
        static double Divide(double firstNumber, double secondNumber)
        {
            return Math.Round((firstNumber / secondNumber),2);
        }
    }
}