Ping An Primary School distributes 648 sets of desks and chairs to 6 grades, and each grade has 3 classes. How many sets of desks and chairs are allocated to each class on average?
平安小学把648套课桌椅分给6个年级，每个年级有3个班，平均每班分到几套课桌椅？
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">648 / 18</gadget>
<output>36</output>

<result>36</result>