mobile phone is sold at a reduced price (1/5), which is exactly 200 yuan cheaper than before the price reduction. How much did you sell before the price cut?
一种手机降价(1/5)出售，正好比降价前便宜200元．降价前卖多少元？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">200 / (1/5)</gadget>
<output>1_000</output>

<result>1_000</result>