Problem 02. Change Tiles

using System;
using System.Collections.Generic;

namespace ConsoleApplication
{
    internal class Program
    {
        public static void Main(string[] args)
        {
            var takemoney = decimal.Parse(Console.ReadLine());
            var weight = decimal.Parse(Console.ReadLine());
            var height = decimal.Parse(Console.ReadLine());
            var a = decimal.Parse(Console.ReadLine());
            var h = decimal.Parse(Console.ReadLine());
            var prize = decimal.Parse(Console.ReadLine());
            var maistor = decimal.Parse(Console.ReadLine());


            var x = (weight * height) / (a * h / 2);


            var total = Math.Ceiling(x) + 5;
            var y = total * prize + maistor;


            if (y <= takemoney)
            {

                Console.WriteLine("{0:f2} lv left.", takemoney-y);

            }
            else
            {
                Console.WriteLine("You'll need {0:f2} lv more.", y-takemoney);
            }
        }
    }
}