The camera in the store is 8,000 yuan, and the price is reduced by 20% in an event. How much is the current price of this camera?
商店摄像机8000元，现搞活动降价20%销售，问这台摄像机现价多少钱？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">8_000 * (4/5)</gadget>
<output>6_400</output>

<result>6_400</result>