#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef unsigned long long ull;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> P;

const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS  = 1e-10;

int main() {
	string s;
	cin >> s;
	
	vector<int> num;
	vector<int> op;
	
	num.push_back(0);
	REP(i, s.size()) {
		if (isdigit(s[i])) num[num.size() - 1] = num[num.size() - 1] * 10 + (s[i] - '0');
		else {
			if (s[i] == '*') op.push_back(0);
			else op.push_back(1);
			num.push_back(0);
		}
	}
	
	int ans = num[0];
	REP(i, op.size()) {
		if (op[i] == 0) ans += num[i + 1];
		else ans *= num[i + 1];
	}
	cout << ans << endl;
	
	return 0;	
}