class Program
    {
        static void Main(string[] args)
        {
            char[] symbol = { '*', '+' };
            string decision = Console.ReadLine();
            string[] numberList = decision.Split(symbol);
            int result = int.Parse(numberList[0]);
            int count = 1;
            int ngnumber = 0;
            for (int i = 0; i < decision.Length; i++) {
                bool isNumeric = int.TryParse(decision[i].ToString(), out ngnumber);
                if (isNumeric) {
                    continue;
                }
                if (decision[i] == symbol[0])
                {
                    result += int.Parse(numberList[count]);
                }
                else
                {
                    result *= int.Parse(numberList[count]);
                }
                count++;
                if (count == numberList.Length)
                {
                    break;
                }

            }
            Console.WriteLine(result);
        }
    }