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

int main() {
	string s; cin >> s;
	ll sum = atoi(s.c_str());
	ll index = log10(sum) + 1;
	while (index<s.size()) {
		ll x = atoi(s.c_str() + index + 1);
		sum = (s[index] == '*' ? sum + x : sum * x);
		index += 1 + (x == 0 ? 1 : log10(x)) + 1;
	}
	cout << sum << endl;
	return 0;
}