#include<iostream>
#include<string>
#include<cctype>

int main() {
	std::string s;
	std::cin >> s;

	int ans, pos;

	for (pos = 0; pos < s.length(); pos++) {
		if (!isdigit(s[pos])) break;
	}

	ans = std::stoi(s.substr(0, pos));

	for (; pos < s.length();) {
		char c = s[pos];
		pos++;
		int start = pos;
		for (;pos < s.length(); pos++) {
			if (!isdigit(s[pos])) break;
		}

		int num = std::stoi(s.substr(start, pos - start));
		if (c == '*') ans += num;
		else ans *= num;
	}

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