import java.util.*;
import java.util.regex.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner koko = new Scanner(System.in);
        String s = koko.next();
        int n=0;
        String pn = "['*''+']+";
        Pattern pnum = Pattern.compile(pn);
        String[] num = pnum.split(s);
        int[] number = new int[num.length];
        String[] siki = new String[num.length-1];
        Matcher m = pnum.matcher(s);
        int si = 0;
        while(m.find()){
            siki[si++]=m.group(0);
        }
        for(int i=0; i<num.length; i++){
            number[i]=Integer.parseInt(num[i]);
        }
        int total=number[0];
        for(int i=0; i<siki.length; i++){
            if(siki[i].equals("+")){
                total=total*number[i+1];
            }else{
                total=total+number[i+1];
            }
        }
        System.out.println(total);
    }
}