#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <set>
#include <stack>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std; // NOLINT

int main() {
    string s;
    getline(cin, s);
    int32_t ans = 0, t = 0;
    char op = 0;
    for (auto c : s) {
        if (c == '*' || c == '+') {
            if (op == '+')
                ans *= t;
            else
                ans += t;
            op = c;
            t = 0;
        } else {
            t = t * 10 + (c - '0');
        }
    }
    if (op == 0)
        ans = t;
    else if (op == '+')
        ans *= t;
    else
        ans += t;
    cout << ans << endl;
    return 0;
}