The school bought 5 boxes of chalk, a total of 90 boxes, which were distributed to 18 classes on average. How many boxes are assigned to each class?
学校买来5箱粉笔，一共90盒，平均分给18个班．每个班分到多少盒？
<gadget id="calculator">90 / 18</gadget>
<output>5</output>

<result>5</result>