The school newly purchased 225 books and distributed them to each class on average. If each class can be divided into 5 books, how many classes are there in the school?
学校新买进225本图书，平均分给每个班．如果每个班可以分5本，那么学校共有多少个班？
<gadget id="calculator">225 / 5</gadget>
<output>45</output>

<result>45</result>