#include <bits/stdc++.h>
#define REP(i,n) for(int i = 0; i < (int)(n); ++i)
using namespace std;

int main(){
    string S;
    cin >> S;
    vector<int> N;
    vector<string> M;
    string temp = "";

    REP(i,S.size()){
        if(S[i]=='+'){
            N.push_back(stoi(temp));
            M.push_back("a");
            temp = "";
        }else if(S[i]=='*'){
            N.push_back(stoi(temp));
            M.push_back("b");
            temp = "";
        }
        else{
            temp += S[i];
        }
    }
    N.push_back(stoi(temp));
    int ans = N[0];
    REP(i,M.size()){
        if(M[i]=="a"){
            ans *= N[i+1];
        }else{
            ans += N[i+1];
        }
    }
    cout << ans << endl;
    return 0;
}