#include<iostream>
#include<string>

using namespace std;

int main(){
    string s,tmp = "";
    char prev = ' ';
    cin >> s;

    int ans = 0;
    for(char c: s){
        if(c == '*'){
            if(prev == '*') ans += (int)stoi(tmp);
            if(prev == '+') ans *= (int)stoi(tmp);
            if(!(prev == '*' || prev == '+')) ans += (int)stoi(tmp);
            prev = '*';
            tmp = "";
        }else if(c == '+'){
            if(prev == '+') ans *= (int)stoi(tmp);
            if(prev == '*') ans += (int)stoi(tmp);
            if(!(prev == '*' || prev == '+')) ans += (int)stoi(tmp);
            prev = '+';
            tmp = "";
        }else tmp += c;
        //debug
        // cout << "tmp: " << tmp << endl;
        // cout << "ans: " << ans << endl;
        // cout << "prev: " << prev << endl;
        // cout << endl;
    }
    if(prev == '*') ans += (int)stoi(tmp);
    if(prev == '+') ans *= (int)stoi(tmp);
    cout << ans << endl;
    return 0;
}