import java.util.Scanner;
public class ZeroJudge {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
s.next();
while(s.hasNext()){
Integer r = 1;
for(char i : s.next().toCharArray())
r *= Character.getNumericValue(i);
System.out.println(r);
}
}
}