There are 60 willow trees in the campus, which are less than poplar trees (1/5). How many poplar trees are there?
校园里有柳树60棵，比杨树少(1/5)，杨树有多少棵？
<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">60 / (4/5)</gadget>
<output>75</output>

<result>75</result>