There are 156 students in the third grade, and 24 students in the fourth grade. How many students are there in the third and fourth grades?
三年级有156人，四年级比三年级少24人，三、四年级一共有多少人？
<gadget id="calculator">156 - 24</gadget>
<output>132</output>

<gadget id="calculator">132 + 156</gadget>
<output>288</output>

<result>288</result>