#include <iostream>
#include <string>

void solve() {
    std::string s;
    std::cin >> s;
    s.push_back('$');

    int ans = 0, x = 0;
    char prev = '*';

    for (char c : s) {
        if (std::isdigit(c)) {
            x = x * 10 + c - '0';

        } else {
            if (prev == '*') {
                ans += x;
            } else {
                ans *= x;
            }

            prev = c;
            x = 0;
        }
    }

    std::cout << ans << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}