The school organizes interest group activities. There are 25 people in the art group. The number of people in the art group is 1/4 more than that of the aircraft model group. How many people are there in the aircraft model group?
学校开展兴趣小组活动，美术组有25人，美术组的人数比航模组多(1/4)，航模组有多少人？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">25 / (5/4)</gadget>
<output>20</output>

<result>20</result>