The school math group has 20% more people than the art group. If there are 30 people in the math group, how many people are there in the art group? (column equation solution)
学校数学小组的人数比美术小组的人数多20%，如果数学小组有30人，那么美术小组有多少人？(列方程解答)
<gadget id="calculator">30 / 1.2</gadget>
<output>25</output>

<result>25</result>