You are given a sentence in English. Your job is to translate the English sentence into Portugese.

Let me give you an example: Astronomers now believe that every star in the galaxy has a planet, and they speculate that up to one fifth of them have an Earth-like planet that might be able to harbor life, but we haven't seen any of them.
The answer to this example can be: Os astrónomos acreditam que cada estrela da galáxia tem um planeta, e especulam que até um quinto deles tem um planeta do tipo da Terra que poderá ter vida, mas ainda não vimos nenhum deles.
Here is why: The English sentence is correctly translated into Portugese, because the meaning is preserved.

OK. solve this:
(Laughter) Well, yeah.
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
(Risos) Bem, pois.