The students went on a trip, and 63 people in the third grade went there, three times that of the fourth grade. How many people went there in total?
同学们去出游，三年级去了63人，是四年级的3倍，一共去了多少人？
<gadget id="calculator">63 / 3</gadget>
<output>21</output>

<gadget id="calculator">21 + 63</gadget>
<output>84</output>

<result>84</result>