The school bought a batch of books. If each class is divided into 30 books, it can be distributed to 8 classes. Now it needs to be distributed to 12 classes. How many books can each class get? (Solve with ratio)
学校买来一批图书，如果每班分30本，可以分给8个班，现在需要分给12个班，每班只能分到多少本？(用比例解)
<gadget id="calculator">30 * 8</gadget>
<output>240</output>

<gadget id="calculator">240 / 12</gadget>
<output>20</output>

<result>20</result>