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

typedef long long Int;
#define REP(i,n) for(int (i)=0;(i)<(int)(n);++(i))

int main() {
	string s; cin >> s;
	vector<int> nums;
	string ops;

	int t = 0;
	REP(i, s.size()) {
		if (s[i] == '+') {
			ops += '*';
			nums.push_back(t);
			t = 0;
		} else if (s[i] == '*') {
			ops += '+';
			nums.push_back(t);
			t = 0;
		}
		else {
			t = 10 * t + (s[i] - '0');
		}
	}
	nums.push_back(t);
	int ans = nums[0];
	for (int i = 1; i < nums.size(); i++) {
		if (ops[i - 1] == '+') ans += nums[i];
		if (ops[i - 1] == '*') ans *= nums[i];
	}
	cout << ans << endl;
}