static void Main(string[] args)
        {
            Account nakov = new DepositAccount()
            {
                Balance  = 20000,
                Customer = new IndividualCustomer()
                {
                    Name = "Nakov"
                },
                MonthlyInterestRate = 0.076m
            };

            decimal nakovInterest = nakov.CalculateInterest(24);

            Console.WriteLine(nakovInterest);

            Account mortgageNakovAcc = new MortgageAccount()
            {
                Balance  = 2300000,
                Customer = new CompanyCustomer()
                {
                    Name = "SoftUni"
                },
                MonthlyInterestRate = 0.086m
            };

            decimal mortageInterest = mortgageNakovAcc.CalculateInterest(4);

            Console.WriteLine(mortageInterest);
        }
        static void Main(string[] args)
        {
            Account nakov = new DepositAccount()
            {
                Balance = 20000,
                Customer = new IndividualCustomer() { Name = "Nakov" },
                MonthlyInterestRate = 0.076m
            };

            decimal nakovInterest = nakov.CalculateInterest(24);
            Console.WriteLine(nakovInterest);

            Account mortgageNakovAcc = new MortgageAccount()
            {
                Balance = 2300000,
                Customer = new CompanyCustomer() { Name = "SoftUni" },
                MonthlyInterestRate = 0.086m
            };

            decimal mortageInterest = mortgageNakovAcc.CalculateInterest(4);
            Console.WriteLine(mortageInterest);
        }