#include <vector>
#include <queue>
#include <deque>
#include <stack>
#include <map>
#include <set>
#include <algorithm>
#include <functional>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cctype>
#include <string>
#include <cstring>

using namespace std;

typedef long long ll;


int main() {
  string str;
  cin >> str;
  ll ans = 0;

  ll t = 0; char ch = '*';
  for (int i = 0; i < str.size(); i++) {
    if (str[i] == '+' || str[i] == '*' || i == str.size()-1) {
      if (i == str.size()-1) t = t*10+str[i]-'0';
      if (ch == '+') ans *= t;
      if (ch == '*') ans += t;
      ch = str[i];
      t = 0;
    }else {
      t = t*10+str[i]-'0';
    }
  }


  cout << ans << endl;
}