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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    string s; cin >> s; s += '*';
    int now = 0,answer = 0;
    bool multi = false;
    for(auto c : s){
        if(c == '+'){
            if(multi) answer *= now,now = 0;
            else answer += now,now = 0;
            multi = true;
        }
        else if(c == '*'){
            if(multi) answer *= now,now = 0;
            else answer += now,now = 0;
            multi = false;
        }
        else now *= 10,now += c-'0';
    }
    
    cout << answer << endl;
}