A watch is sold at 20% off the list price, the price is 160 yuan, how much is the list price.
一块手表按标价的八折销售，售价为160元，标价为多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">160 / (4/5)</gadget>
<output>200</output>

<result>200</result>