#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

int main() {
    string s;
    cin >> s;
    int n = s.size();
    int ans = 0;

    int tmp = 0;
    int flag = 0;
    rep(i,n){
        if(s[i] == '*'){
            if(flag == 0){
                ans = tmp;
            }else if(flag == 1){
                ans += tmp;
            }else{
                ans *= tmp;
            }
            flag = 1;
            tmp = 0;
        }else if(s[i] == '+'){
            if(flag == 0){
                ans = tmp;
            }else if(flag == 1){
                ans += tmp;
            }else{
                ans *= tmp;
            }
            flag = 2;
            tmp = 0;
        }else{
            tmp *= 10;
            tmp += s[i] - '0';
        }
    }
    if(flag == 0){
        ans = tmp;
    }else if(flag == 1){
        ans += tmp;
    }else{
        ans *= tmp;
    }
    flag = 2;

    cout << ans << endl;
    return 0;
}