There are 30 boys in the airplane model club, more than girls (1/5). How many girls are there in the airplane model club?
航模俱乐部有男生30人，比女生人数多(1/5)，航模俱乐部有女生多少人？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">30 / (6/5)</gadget>
<output>25</output>

<result>25</result>