biscuits factory

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Threading;

namespace ConsoleApp1
{
    class Exam
    {
        static void Main(string[] args)
        {
            double biscuits = double.Parse(Console.ReadLine());
            int workers = int.Parse(Console.ReadLine());
            int concurent = int.Parse(Console.ReadLine());

            double production = 0;

            for (int i = 1; i <= 30; i++)
            {

                if (i % 3 == 0)
                {
                    production += Math.Floor(biscuits * workers * 0.75);
                }
                else
                {
                    production += biscuits * workers;
                }
            }

            Console.WriteLine($"You have produced {production} biscuits for the past month.");

            if (production > concurent)
            {
                double percentage = (production - concurent) / concurent * 100.0;
                Console.WriteLine($"You produce {percentage:F2} percent more biscuits.");
            }
            if (production < concurent)
            {
                double percentage = (concurent - production) / concurent * 100.0;
                Console.WriteLine($"You produce {percentage:F2} percent less biscuits.");
            }
        }
    }
}