Sea Trip

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

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            double food = double.Parse(Console.ReadLine());
            double souv = double.Parse(Console.ReadLine());
            double hotel = double.Parse(Console.ReadLine());
            double hotel1 = hotel * 0.9;
            double hotel2 = hotel * 0.85;
            double hotel3 = hotel * 0.8;
            double gas = 420 / 100 * 7;
            double gasPr = 29.4 * 1.85;
            double souvfood = 3 * food + 3 * souv;
            double total = gasPr + souvfood + hotel1 + hotel2 + hotel3;
            Console.WriteLine($"Money needed: {total:F2}");
        }
    }
}