#include <iostream>
#include <string>
#include <sstream>
#include <algorithm>
 
using namespace std;
 
template <typename Iterator> void F1(string & str, Iterator begin, Iterator end)
{
         Iterator i, temp, i1;
         int count = 0;
         float f;
         for ( ;; ) { 
             for (i = str.begin ();i != str.end ();++i) { 
                 if (*i == '(') {
                        ++count;
                        temp = i;
                 }
                 else if (*i == ')') {
                      ++count;
                      f=F(temp,i+1);
                      ostringstream ss;
                      ss << f ;
                      string s = ss.str();
                      str.replace (temp,i+1,s) ;
                 }
             }
             if (count == 0) return; 
         }
}
 
template <typename Iterator> float F(Iterator begin, Iterator end)
{     
 Iterator i;
 if ((i = find(begin,end,'+')) != end) {
 return F(begin,i) + F(i+1,end) ;
 }else if ((i = find(begin,end,'-')) != end) {
 return F(begin,i) - F(i+1,end) ;
 }else if ((i = find(begin,end,'*')) != end) {
 return F(begin,i) * F(i+1,end) ;
 }else if ((i = find(begin,end,'/')) != end) {
 return F(begin,i) / F(i+1,end) ;  
 }else { string str1(begin,end) ;
               istringstream stream(str1);
               float i;
               stream >> i;
               return  i ;              
      }
}
 
int main() 
{
    string str,str1;
    float a;
    getline(cin,str);
    F1(str,str.begin(),str.end());
    a = F(str.begin(),str.end());
    cout << "Ats: " << a << endl;
    cin.get();
}