Здравейте, може ли някой да ми каже защо като решавам задачата като я реша така: 

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

namespace CakeTycoon
{
    class Program
    {
        static void Main(string[] args)
        {
            ulong amount = ulong.Parse(Console.ReadLine());
            double kgForOneCake = double.Parse(Console.ReadLine());
            uint flaurAvailable = uint.Parse(Console.ReadLine());
            uint trufflesAmount = uint.Parse(Console.ReadLine());
            uint truffflesPrice = uint.Parse(Console.ReadLine());
            double maxCakes = Math.Floor(flaurAvailable / kgForOneCake);
            ulong trufflesCost = (ulong)trufflesAmount * truffflesPrice;
           
            if (amount > maxCakes)
            {
                double flaurNeeded = (amount * kgForOneCake) - flaurAvailable;
                Console.WriteLine("Can make only {0} cakes, need {1:f2} kg more flour", maxCakes, flaurNeeded);
            }
            else
            {
                double cakePrice = ((double)trufflesCost / amount) * 1.25d;
                Console.WriteLine("All products available, price of a cake: {0:f2}", cakePrice);
            }

        }
    }
}

е вярна а като разменя само това в ифа и ми дава 75/100 в джъджа без обяснение

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

namespace CakeTycoon
{
    class Program
    {
        static void Main(string[] args)
        {
            ulong amount = ulong.Parse(Console.ReadLine());
            double kgForOneCake = double.Parse(Console.ReadLine());
            uint flaurAvailable = uint.Parse(Console.ReadLine());
            uint trufflesAmount = uint.Parse(Console.ReadLine());
            uint truffflesPrice = uint.Parse(Console.ReadLine());
            double maxCakes = Math.Floor(flaurAvailable / kgForOneCake);
            ulong trufflesCost = (ulong)trufflesAmount * truffflesPrice;
           
            if (amount < maxCakes)
            {
                double cakePrice = ((double)trufflesCost / amount) * 1.25d;
                Console.WriteLine("All products available, price of a cake: {0:f2}", cakePrice);
            }
            else
            {
               

                double flaurNeeded = (amount * kgForOneCake) - flaurAvailable;
                Console.WriteLine("Can make only {0} cakes, need {1:f2} kg more flour", maxCakes, flaurNeeded);
            }

        }
    }
}

ето линк към задачата https://judge.softuni.bg/Contests/Practice/Index/149#0