#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <fstream>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>
#include <numeric>
#include <iterator>

typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;

int gcd(int a, int b) {
    if (a < b)swap(a, b);
    if (b == 0)return a;
    return gcd(b, a % b);
}
int lcm(int a, int b) {
    return a * b / gcd(a, b);
}


int main()
{

    int Q;
    Q = 1;
    //cin >> Q;


    while (Q--) {
        
        string p;
        cin >> p;
        int r = 0;
        int t=0;
        int x = 0;
        for (int i = 0; i < p.size(); i++) {
            if (p[i] == '*') {
                if (t==1) {
                    r += x;
                }
                else if (t == 2) {
                    r *= x;
                }
                else {
                    r = x;
                }
                t = 1; x = 0;
            }
            else if (p[i] == '+') {
                if (t == 1) {
                    r += x;
                }
                else if (t == 2) {
                    r *= x;
                }
                else {
                    r = x;
                }
                t = 2; x = 0;
            }
            else {
                x *= 10; x += p[i] - '0';
            }
        }
        if (t == 1) {
            r += x;
        }
        else if (t == 2) {
            r *= x;
        }
        else {
            r = x;
        }
        cout << r;
    }
    return 0;
}