#include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <list>
#include <deque>
#include <algorithm>
#include <iomanip>
#include <functional>
#include <numeric>
#include <sstream>

#define REP(i, n) for(decltype(n) i = 0; i < (n); i++)
#define REP2(i, x, n) for(decltype(x) i = (x); i < (n); i++)
#define RREP(i, n) for (decltype(n) i = (n) - 1;i >= 0; i--)

#define ALL(a) (a).begin(),(a).end()
#define SORT(c) sort((c).begin(),(c).end())
#define DESCSORT(c) sort(c.begin(), c.end(), greater<int>())

#define LL long long int
#define LD long double

#define PI 3.14159265358979

using namespace std;

//================================================
int A = 0, ans;
bool B = false;

void func() {
	if (B) {
		ans *= A;
	} else {
		ans += A;
	}
	A = 0;
}


int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	string S;
	cin >> S;

	int Ssize = S.size();
	REP(i, Ssize) {
		if (S[i] == '*') {
			func();
			B = false;
		} else if (S[i] == '+') {
			func();
			B = true;
		} else {
			A *= 10;
			A += S[i] - '0';
		}
	}

	func();
	cout << ans << "\n";
	return 0;
}