import java.util.Scanner;

public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		String s=scanner.next();
		String x[]=s.split("[\\+\\*]");
		int tmp=Integer.parseInt(x[0]);
		int j=1;
		for(int i=0;i<s.length();i++) {
			if(s.charAt(i)=='+') {
				tmp*=Integer.parseInt(x[j]);
				j++;
			}else if(s.charAt(i)=='*') {
				tmp+=Integer.parseInt(x[j]);
				j++;
			}
		}
		System.out.println(tmp);
	}
}