#include<iostream>
#include<sstream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<string>
#include<vector>
#include<cmath>
#include<set>
#include<map>
#include<stack>
#include<queue>
#include<numeric>
#include<functional>
#include<complex>

using namespace std;
#define BET(a,b,c) ((a)<=(b)&&(b)<(c))
#define FOR(i,n) for(int i=0,i##_end=(int(n));i<i##_end;i++)
#define SZ(x) (int)(x.size())
#define ALL(x) (x).begin(),(x).end()
#define MP make_pair
#define FOR_EACH(it,v) for(__typeof(v.begin()) it=v.begin(),it_end=v.end() ; it != it_end ; it++)
typedef vector<int> VI;
typedef vector<VI> VVI;

int getInt(const string&s, int& cur){
    int x = 0;
    while(cur < SZ(s) && isdigit(s[cur])){
        x = x * 10 + (s[cur++] - '0');
    }
    return x;
}

int main()
{
    string s;
    cin>>s;
    int cur = 0 ;
    int a = getInt(s, cur);
    while(cur < SZ(s)){
        if(s[cur] == '+'){
            cur++;
            a = a * getInt(s, cur);
        }else {
            cur++;
            a = a + getInt(s, cur);
        }
    }
    cout<<a<<endl;
    
    return 0;
}