import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    int ans = 0;
    String st = "";
    int p = 0;
    String c = "";
    for(int i = 0; i < s.length(); i++) {
      String str = String.valueOf(s.charAt(i));
      if(str.equals("*")) {
        int d = Integer.parseInt(st);
        st = "";
        if(p == 0) {
          ans += d;
        } else {
          if(c.equals("*")) {
            ans += d;
          } else {
            ans *= d;
          }
        }
        p++;
        c = "*";
      } else if(str.equals("+")) {
        int d = Integer.parseInt(st);
        st = "";
        if(p == 0) {
          ans += d;
        } else {
          if(c.equals("*")) {
            ans += d;
          } else {
            ans *= d;
          }          
        }
        p++;
        c = "+";
      } else {
        st += str;
        int d = Integer.parseInt(st);
        if(i == s.length() - 1) {
          if(c.equals("*")) {
            ans += d;
          } else {
            ans *= d;
          }
        }
      }
    }
    System.out.println(ans);
  }
}