#include <bits/stdc++.h>

#define show(x) cout << #x << " = " << x << endl

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
    os << "sz=" << v.size() << "\n[";
    for (const auto& p : v) {
        os << p << ",";
    }
    os << "]\n";
    return os;
}

template <typename S, typename T>
ostream& operator<<(ostream& os, const pair<S, T>& p)
{
    os << "(" << p.first << "," << p.second
       << ")";
    return os;
}


constexpr ll MOD = 1e9 + 7;

template <typename T>
constexpr T INF = numeric_limits<T>::max() / 100;

bool isnum(char c)
{
    return '0' <= c and c <= '9';
}

int main()
{
    string s;
    cin >> s;
    s.push_back(' ');
    int num_ind = 0;
    int ind = 0;
    int ans = 0;
    char op = 0;
    while (ind < s.size()) {
        if (not isnum(s[ind])) {
            if (op == 0) {
                ans = stoi(s.substr(num_ind, ind - num_ind));
            } else {
                if (op == '+') {
                    ans *= stoi(s.substr(num_ind, ind - num_ind));
                } else {
                    ans += stoi(s.substr(num_ind, ind - num_ind));
                }
            }
            if (s[ind] == '+') {
                op = '+';
            } else {
                op = '*';
            }
            num_ind = ind + 1;
        }
        ind++;
    }
    cout << ans << endl;
    return 0;
}