In a library, there are three sections: fiction, non-fiction, and children's books. The librarian, Mrs. Smith, is responsible for organizing the books in each section. One day, while she's away at lunch, a group of mischievous kids comes in and rearranges the books, mixing up the sections. Where does Mrs. Smith think each type of book is located when she returns, and where will she actually find them? Provide a very brief response.
Mrs. Smith expects to find fiction books in the fiction section, non-fiction books in the non-fiction section, and children's books in the children's book section because that is how she organized the library.

After the mischievous kids rearranged the books, the actual location of each type of book is mixed up. This means when Mrs. Smith looks in the fiction section, she may find non-fiction and children's books instead of just fiction books. Similarly, in the non-fiction section, she may come across fiction and children's books, and in the children's books section, she may find a mix of fiction and non-fiction books that should not be there.

Mrs. Smith will need to reorganize the books to match her original organization layout: fiction with fiction, non-fiction with non-fiction, and children's books with children's books.