import java.util.HashSet;
import java.util.Scanner;

public class Main {
	public static int solve(String S){
		int sum = 0, i = 0;
		
		String ss = "";
		String before = "";
		
		while(true){
			char si = S.charAt(i);
			if (si == '*' || si == '+') {
				sum = Integer.parseInt(ss);
				before = String.valueOf(si);
				i++;
				break;
			}
			else{
				ss += si;
				i++;
			}
		}
		
		ss = "";
		
		while(i < S.length()){
			char si = S.charAt(i);
			if (si == '*') {
				if(before.equals("*")){
					sum += Integer.parseInt(ss);
				}
				else {
					sum *= Integer.parseInt(ss);
				}
				before = String.valueOf(si);
				ss = "";
			}
			else if (si == '+') {
				if (before.equals("*")) {
					sum += Integer.parseInt(ss);
				}
				else{
					sum *= Integer.parseInt(ss);
				}
				before = String.valueOf(si);
				ss = "";
			}
			else{
				ss += String.valueOf(si);
				if (i == S.length() - 1) {
					if (before.equals("*")) {
						sum += Integer.parseInt(ss);
					}
					else {
						sum *= Integer.parseInt(ss);
					}					
				}
			}
			i++;
		}
		return sum;
	}
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		String S = sc.next();

		System.out.println(solve(S));
	}
}