There are 235 boys and 220 girls in the second grade. They are divided into 13 classes on average. How many students are in each class?
二年级有男生235人，女生220人，平均分成13个班，每班多少人？
<gadget id="calculator">235 + 220</gadget>
<output>455</output>

<gadget id="calculator">455 / 13</gadget>
<output>35</output>

<result>35</result>