The students cleaned up, 36 people cleaned the playground, three times the number of people who cleaned the classroom, and 27 people cleaned the yard. How many people participated in the cleaning?
同学们大扫除，打扫操场的有36人，是打扫教室的人数的3倍，打扫院子的有27人．参加大扫除的一共有多少人？
<gadget id="calculator">36 / 3</gadget>
<output>12</output>

<gadget id="calculator">36 + 12 + 27</gadget>
<output>75</output>

<result>75</result>