They would have to walk longer before they reach their destiny.
EXPLAINATION: TRY LANG
cause on today's generation there's a lot of teenager who are dating and doing something.
so it would be a nice topic on your research
the scientific reason why empty cans make the loudest noise because empty cans has more space inside, allowing sound to echo loudly. applying that to people, the meaning of the idiom is that people with empty brains (stupid or have no knowledge) makes the loudest noise (by chatting with their seatmate or just being overall noisy).