There are 25 people in the art group of the sixth grade class, which is 1/4 more than the model group. How many people participated in the model airplane team?
六年级一班美术小组有25人，比航模小组的人数多(1/4)．参加航模小组的有多少人？
<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>