#include <iostream>
#include <iomanip>
#include <vector>

int main(void)
{
  std::cin.tie(0);
  std::ios::sync_with_stdio(false);
  std::cout << std::fixed << std::setprecision(2);
  std::string s;
  std::cin >> s;
  std::vector< int > number;
  std::vector< bool > isadd;
  for (auto c : s) {
    if (c=='*') isadd.push_back(true);
    else if (c=='+') isadd.push_back(false);
    else {
      if (number.size() == isadd.size()) number.push_back(c-'0');
      else number[number.size()-1] = number[number.size()-1] * 10 + (c-'0');
    }
  }
  int ans = number[0];
  for (int i = 0; i < isadd.size(); ++i) {
    if (isadd[i]) ans += number[i+1];
    else ans *= number[i+1];
  }
  std::cout << ans << std::endl;
  return 0;
}