There are 180 books in the school library, 108 books have been borrowed, and the rest are distributed to 8 classes on average. How many books can each class get?
学校图书馆有180本书，借走了108本，剩下的平均分给8个班，每个班能分到几本？
<gadget id="calculator">180 - 108</gadget>
<output>72</output>

<gadget id="calculator">72 / 8</gadget>
<output>9</output>

<result>9</result>