The aircraft model group of Meilan Primary School has 30 people, which is less than the art group (2/5). How many people are there in the art group of Meilan Primary School?
梅兰小学航模小组有30人，比美术小组的人数少了(2/5)．梅兰小学美术小组有多少人？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / (3/5)</gadget>
<output>50</output>

<result>50</result>