There are 240 poplars in the park, 20 more than willows (2/3). How many willows are there?
公园里杨树有240棵，比柳树的(2/3)多20棵，柳树有多少棵？
<gadget id="calculator">240 - 20</gadget>
<output>220</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">220 / (2/3)</gadget>
<output>330</output>

<result>330</result>