The students went to visit the exhibition. The first grade has 48 students, the second grade has 16 more students than the first grade, and 20 students less than the third grade. How many people are there in the third grade?
同学们去参观展览．一年级有48人，二年级比一年级多16人，比三年级少20人．三年级有多少人？
<gadget id="calculator">48 + 16 + 20</gadget>
<output>84</output>

<result>84</result>