The aircraft model group of Meilan Primary School has 20 people, which is less than the art group (1/5). How many people are there in the art group of Meilan Primary School? (solution with equation)
梅兰小学航模小组有20人，比美术小组的人数少了(1/5)．梅兰小学美术小组有多少人？(用方程解答)
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<result>25</result>