The school newly purchased 480 skipping ropes, which are divided equally among the fourth, fifth and sixth grades. Each grade has 4 classes. How many skipping ropes are allocated to each class on average?
学校新购480根跳绳，平均分给四、五、六年级，每个年级都有4个班，平均每个班分得多少根跳绳？
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">480 / 12</gadget>
<output>40</output>

<result>40</result>