using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TorrentPirat
{
    class Program
    {
        static void Main(string[] args)
        {
            double totalMB = double.Parse(Console.ReadLine());
            double cinema = double.Parse(Console.ReadLine());
            double mPerHour = double.Parse(Console.ReadLine());


            double downloadTime=(double)((totalMB)/(2)/(60)/(60));
            double priceForDown = (double)(downloadTime * mPerHour);
            double cinemaPrice = (double)(totalMB / 1500)*(cinema);

            if(priceForDown<=cinemaPrice)
            {
                Console.WriteLine("mall -> {0:F2}", priceForDown);
            }
            else
            {
                Console.WriteLine("cinema -> {0:F2}", cinemaPrice);
            }
        }
    }
}