using System;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        string s = Console.ReadLine();
        var n = s.Split('*', '+').Select(int.Parse).ToArray();
        var op = new Queue<char>();
        for (int i = 0; i < s.Length; i++)
            if (!char.IsDigit(s[i])) op.Enqueue(s[i]);

        int ans = n[0];

        for (int i = 1; i < n.Length; i++)
        {
            char ope = op.Dequeue();
            if (ope == '+') ans *= n[i];
            else ans += n[i];
        }

        Console.WriteLine(ans);
    }
}