#include <bits/stdc++.h>
using namespace std;

int main() {
    string S;
    cin >> S;

    int ans = 0, tmp = 0, opr = 0;
    auto calc = [&]() {
        if (opr)
            ans *= tmp;
        else
            ans += tmp;
        tmp = 0;
    };

    for (auto& c : S) {
        if (c == '*') {
            calc();
            opr = 0;
        } else if (c == '+') {
            calc();
            opr = 1;
        } else {
            tmp = tmp * 10 + (c - '0');
        }
    }
    calc();

    cout << ans << endl;
}