There are 5 classes in the third grade in a certain school, with 45 students in each class. The number of students in the second grade is 12 more than that of the third grade. How many students are there in the second grade?
某校三年级有5个班，每班45人，二年级的人数比三年级多12人，二年级有多少人？
<gadget id="calculator">5 * 45</gadget>
<output>225</output>

<gadget id="calculator">225 + 12</gadget>
<output>237</output>

<result>237</result>