import java.util.Scanner;
public class Main {
    static Scanner in = new Scanner(System.in);
    public static void main(String[] args) {
        String[] s = in.nextLine().replaceAll("(\\+|\\*)", "_$1_").split("_");
        int sum = Integer.parseInt(s[0]);
        for(int i = 1; i < s.length; i += 2){
            if(s[i].equals("+")){
                sum *= Integer.parseInt(s[i + 1]);
            }else if(s[i].equals("*")){
                sum += Integer.parseInt(s[i + 1]);
            }
        }
        System.out.println(sum);
    }
}