The price of a pair of trousers after a 20% discount is 240 yuan. What is the original price of the trousers?
一条裤子打八折后的价钱是240元，这条裤子的原价是多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">240 / (4/5)</gadget>
<output>300</output>

<result>300</result>