A jacket is more expensive than a pair of trousers (5/9). It is known that a jacket is 180 yuan more expensive than a pair of trousers. How much is a pair of trousers?
一件上衣比一条裤子贵(5/9)，已知一件上衣比一条裤子贵180元，一条裤子多少元？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">180 / (5/9)</gadget>
<output>324</output>

<result>324</result>