The school bought 870 children's books and distributed them to 6 grades. Each grade has 5 classes. How many books can each class get on average?
学校买来儿童读物870本，分给6个年级，每个年级有5个班，平均每个班能分到多少本？
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">870 / 30</gadget>
<output>29</output>

<result>29</result>