There are 308 students in the third grade, which is 76 more than the second grade. How many students are there in the two grades?
三年级有308人，比二年级多76人，问两个年级一共有多少人？
<gadget id="calculator">308 - 76</gadget>
<output>232</output>

<gadget id="calculator">232 + 308</gadget>
<output>540</output>

<result>540</result>