#include <iostream>
#include <algorithm>
#include <vector>
#include <cstring>
#include <cstdio>
#include <cmath>
using namespace std;

int main(void){
	string s; cin >> s;
	long long ans = 0;
	int memo = 0;//0 = (*) 1 = (+)
	for (int l = 0; l < s.size(); ++l){
		double cnt = -1;
		int now = 0;
		int r;

		for (r = l; r < s.size(); ++r){
			if(s[r] == '*' || r == s.size() - 1){
				if(r != s.size() - 1){
					for (int i = l; i < r; ++i){
						now += (s[i] - '0')	* pow(10, cnt);
						cnt--;
					}
				}else{
					for (int i = l; i <= r; ++i){
						now += (s[i] - '0')	* pow(10, cnt + 1);
						cnt--;
					}
				}
				if(memo == 0) ans += now;
				else ans *= now;
				// printf("1 %d %d %d %lld\n", l, r, now, ans);
				memo = 0;
				break;

			}else if(s[r] == '+' || r == s.size() - 1){
				if(r != s.size() - 1){
					for (int i = l; i < r; ++i){
						now += (s[i] - '0')	* pow(10, cnt);
						cnt--;
					}
				}else{
					for (int i = l; i <= r; ++i){
						now += (s[i] - '0')	* pow(10, cnt + 1);
						cnt--;
					}
				}
				if(memo == 0) ans += now;
				else ans *= now;
				// printf("2 %d %d %d %lld\n", l, r, now, ans);
				memo = 1;
				break;
			}
			cnt++;	
		}
		// printf("r:%d\n", r);
		l = r;
		// printf("lsaigo:%d\n", l);
	}
	printf("%lld\n", ans);
	return 0;
}