Our school has six grades, and each grade has 5 classes. On average, each class donates 24 books. How many books does one donate in the whole school?
我们学校有六个年级，每个年级有5个班，平均每个班捐图书24本，全校一个捐图书多少本？
<gadget id="calculator">24 * 5 * 6</gadget>
<output>720</output>

<result>720</result>