#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>



using namespace std;




int main() {
	string p;
	cin>>p;
	int y=0,x=0;
	vector<int>h;
	bool f=0;
	vector<char>w;
	for(int i=0;i<p.size();i++){
		if(p[i]=='*'){
			h.push_back(y);
			w.push_back('+');
			f=0;
			y=0;
		}
		else if(p[i]=='+'){
		//	if(x)y+=x;
			
			h.push_back(y);
			w.push_back('*');
			y=0;x=0;
			f=0;
		}
		else{
			y*=10;y+=p[i]-'0';
			f=1;
		}
	}
	//if(x)y+=x;
	if(f)h.push_back(y);
	if(w.size()){
	for(int i=0;i<h.size()-1;i++){
		//cout<<h[i];
		if(w[i]=='+')h[0]+=h[i+1];
		else h[0]*=h[i+1];
		//cout<<h[0];
	}
	}
	cout<<h[0]<<endl;
	return 0;
}