。
She put the car in the garage.
Literal
She [topic-は] car [object-を] garage [into-に] put-in.
車庫にいれた uses 入れる (to put in, to insert) with に marking the destination. 車庫 (しゃこ) means garage or car port. A simple, practical sentence demonstrating the に + 入れる pattern for putting something into a container or space.