There are 4 classes in the third grade of a certain school. A total of 504 yuan was donated to the disabled, with an average donation of 3 yuan per person. How many students are there on average in each class?
某校三年级有4个班，共为残疾人捐款504元，平均每人捐3元，平均每班有多少人？
<gadget id="calculator">504 / 3 / 4</gadget>
<output>42</output>

<result>42</result>