#include<iostream>
#include<vector>
#include<string>
#include<algorithm>	
#include<map>
#include<set>
#include<utility>
#include<cmath>
#include<cstring>
#include<queue>
#include<stack>
#include<cstdio>
#include<sstream>
#include<iomanip>
#include<assert.h>
#include<ctime>
#include<cstdlib>
#include<numeric>
#include <typeinfo>
using namespace std;
typedef long long ll;
#define loop(i,a,b) for(ll i=a;i<b;i++)
#define rloop(i,a,b) for(int i=a;i>=b;i--)
const int inf=1e8;
const ll INF=1e16;
#define MOD 1000000007
#define mod 1000000009
#define m 1000003


int main(){
	string s;
	cin>>s;
	int i=0,ans=0;
	int a=0;
	string kazu;
	char kigou='*';
	while(s[i]!='\0'){
		if(s[i]>='0' && s[i]<='9'){
			kazu.push_back(s[i]);
		}else{
			int n=atoi(kazu.c_str());
			if(kigou=='*'){
				ans+=n;
			}else{
				ans*=n;
			}
			kazu="";
			kigou=s[i];
		}
		i++;
	}
	int n=atoi(kazu.c_str());
	if(kigou=='*'){
		ans+=n;
	}else{
		ans*=n;
	}
	cout<<ans<<"\n";
}