#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000

int value(int L, char c, string R) {
	int R0 = stoi(R);
	if (c == '*') return L + R0;
	else return L * R0;
}


int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	string S; cin >> S;
	string L;
	int i = 0;
	while ('0' <= S[i] && S[i] <= '9') {
		L += S[i++];
	}
	int ans = stoi(L);
	while (i < S.length()) {
		char c = S[i++];
		string R;
		while (i < S.length() && '0' <= S[i] && S[i] <= '9') {
			R += S[i++];
		}
		ans = value(ans, c, R);
	}
	cout << ans << endl;


    return 0;
}