Hope Primary School organizes interest group activities. There are 25 people participating in the art group, which is more (1/4) than the aircraft model group. How many people participated in the aircraft model group?
希望小学开展兴趣小组活动，参加美术组的有25人，比参加航模组的人数多(1/4)．参加航模组的有多少人？
<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>