#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000

int main(){
	
	string s;
	cin>>s;
	
	int ans = 0;
	
	while(isdigit(s[0])){
		ans *= 10;
		ans += s[0] - '0';
		s.erase(s.begin());
	}
	while(s.size()!=0){
		char c = s[0];
		s.erase(s.begin());
		int n = 0;
		while(isdigit(s[0])){
			n *= 10;
			n += s[0] - '0';
			s.erase(s.begin());
		}
		if(c=='+')ans *= n;
		else ans += n;
	}
	
	cout<<ans<<endl;
	
	return 0;
}