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

internal class Program
{
    public static void Main(string[] args)
    {
        var s = Console.ReadLine();
        List<string> parsing = new List<string>();
        List<char> token = new List<char>();

        int prev = 0;
        for (int i = 0; i < s.Length; i++)
        {
            if (s[i] == '*' || s[i] == '+')
            {
                parsing.Add(s.Substring(prev, i - prev));
                token.Add(s[i]);
                prev = i + 1;
            }
        }
        if (token.Count == 0)
        {
            Console.WriteLine(s);
            return;
        }
        parsing.Add(s.Substring(prev, s.Length - prev));
        int[] nums = parsing.Select(int.Parse).ToArray();

        var current = nums[0];
        for (int i = 1; i < nums.Length; i++)
        {
            if (token[i - 1] == '*')
            {
                current = current + nums[i];
            }
            else
            {
                current = current * nums[i];                
            }
        }
        Console.WriteLine(current);
    }
}