using System.Collections.Generic;
using System;

public class Hello
{
    public static void Main()
    {
        var s = Console.ReadLine().Trim();
        string[] line = s.Split('*', '+');
        var a = Array.ConvertAll(line, int.Parse);
        var b = new List<char>();
        foreach (var x in s)
            if (x == '+') b.Add('m');
            else if (x == '*') b.Add('p');
        int ans;
        if (b[0] == 'm') ans = a[0] * a[1];
        else ans = a[0] + a[1];
        for (int i = 2; i < a.Length; i++)
            if (b[i - 1] == 'm') ans *= a[i];
            else ans += a[i];
        Console.WriteLine(ans);
    }
}