#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <algorithm>
#include <functional>
#include <limits>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <complex>

using namespace std;

#define INF (INT_MAX/3)
#define PI (2*acos(0.0))
#define EPS (1e-8)

typedef long long ll;
typedef unsigned long long ull;

int main(){
    ios_base::sync_with_stdio(0);
    string s;
    cin >> s;
    vector<int> num;
    vector<char> op;

    int n = 0, cnt = 0;
    for(int i = 0; i < s.size(); i++){
        if(s[i] == '*' || s[i] == '+'){
            num.push_back(n);
            op.push_back(s[i]);
            n = 0; cnt = 0;
        }else{
            n = 10 * n + (s[i] - '0');
        }
    }
    num.push_back(n);

    auto it = op.begin();
    for(int i = 1; i < num.size(); i++){
        if(*it == '*') num[i] = num[i-1] + num[i];
        else num[i] = num[i-1] * num[i];
        it++;
    }
    cout << num[num.size() - 1] << endl;
    return 0;
}