There are 20 people in the art group of the school, and the number of people in the art group is more than that of the aircraft model group (1/4). How many people are there in the aircraft model group?
学校美术小组有20人，美术组的人数比航模小组的人数多(1/4)，航模小组有多少人？
<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">20 / (5/4)</gadget>
<output>16</output>

<result>16</result>