#include <iostream>
#include <cstdint>
#include <string>
#include <vector>

using namespace std;

int main() {

  ios::sync_with_stdio(false);
  cin.tie(0);

  string s;
  cin >> s;
  vector<int> v;
  vector<char> v2;
  int siten = 0;
  int suujinum = 0;
  for (size_t i = 0; i < s.size(); i++) {
    if (s.at(i) == '*') {
      v.push_back(stoi(s.substr(siten, suujinum)));
      v2.push_back('+');
      siten = i + 1;
      suujinum = 0;
    } else if (s.at(i) == '+') {
      v.push_back(stoi(s.substr(siten, suujinum)));
      v2.push_back('*');
      siten = i + 1;
      suujinum = 0;
    } else {
      suujinum++;
    }
    if (i == s.size() - 1) {
      v.push_back(stoi(s.substr(siten, suujinum)));
    }
  }
  int ans = v.at(0);
  for (size_t i = 0; i < v2.size(); i++) {
    if (v2.at(i) == '*') {
      ans *= v.at(i + 1);
    } else {
      ans += v.at(i + 1);
    }
  }
  cout << ans << endl;

}