45 students in class one of the third grade donated 225 books to the children in the disaster area. How many books did each person donate on average?
三年级一班的45个同学向灾区小朋友捐赠了225本书，平均每人捐赠几本书？
<gadget id="calculator">225 / 45</gadget>
<output>5</output>

<result>5</result>