Sunshine Primary School donated 960 books to the earthquake-stricken areas. There are 5 grades in the school, and each grade has 3 classes. How many books are donated by each class on average?
阳光小学为地震灾区捐书960本，全校共有5个年级，每个年级有3个班，平均每个班捐书多少本？
<gadget id="calculator">960 / 5 / 3</gadget>
<output>64</output>

<result>64</result>