#include <bits/stdc++.h>
using namespace std;

signed main(){
  string s;cin>>s;
  int ans=0,tmp=0;
  bool x=0;
  for(char p:s){
    if(p=='+'){
      if(x)ans*=tmp;
      else{
        ans+=tmp;
        x=1;
      }
      tmp=0;
    }
    else if(p=='*'){
      if(x){
        ans*=tmp;
        x=0;
      }
      else ans+=tmp;
      tmp=0;
    }
    else tmp=tmp*10+p-'0';
  }
  if(x)ans*=tmp;
  else ans+=tmp;
  cout<<ans<<endl;
}