There are 180 willow trees in the forest farm, which is 3/4 of the number of poplar trees. How many poplar trees are there in the forest farm?
林场有柳树180棵，是杨树棵数的(3/4)，林场有杨树多少棵？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">180 / (3/4)</gadget>
<output>240</output>

<result>240</result>