Given the task definition and input, reply with output. You are given a sentence in Polish. Your job is to translate the Polish sentence into Japanese.

Włączyłem je więc w pociągu.

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
電車の中で大きな音で聞いたんです