Sunshine Primary School launched a donation activity for the disaster area. There are 4 classes in the fourth grade, with 45 students in each class, and a total donation of 900 yuan. How much is the average donation of each student?
阳光小学开展为灾区捐款活动．四年级有4个班，每班45名学生，共捐款900元，平均每个学生捐款多少元？
<gadget id="calculator">45 * 4</gadget>
<output>180</output>

<gadget id="calculator">900 / 180</gadget>
<output>5</output>

<result>5</result>