#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int main()
{
    int x;
    cin >> x;

    for(;;){
        char c;
        int y;
        if(!(cin >> c >> y))
            break;

        if(c == '*')
            x += y;
        else
            x *= y;
    }
    cout << x << endl;

    return 0;
}