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

namespace foryuki
{
    class Program
    {
        static void Main(string[] args)
        {
            var c = Console.ReadLine().ToCharArray();
            string s = "";
            bool isAdd = true;
            int ans = 0;

            int i = 0;
            while (true)
            {
                s = "";
                while (i < c.Length && char.IsNumber(c[i]))
                {
                    s += c[i];
                    i++;
                }

                if (isAdd)
                {
                    ans = ans + int.Parse(s);
                }
                else
                {
                    ans = ans * int.Parse(s);
                }

                if (i >= c.Length)
                {
                    break;
                }

                if (c[i] == '*')
                {
                    isAdd = true;
                    i++;
                }
                else
                {
                    isAdd = false;
                    i++;
                }
            }

            Console.WriteLine(ans);
        }

        //-------------------------------------------------------------

        static int[] ConvertStringArrayToIntArray(string[] array)
        {
            return Array.ConvertAll(array, str => int.Parse(str));
        }

        static List<int> ConvertStringArrayToIntList(string[] str)
        {
            var list = new List<int>();
            foreach (var c in str)
            {
                list.Add(int.Parse(c));
            }
            return list;
        }
    }
}