The original price of a set of furniture is 5,000 yuan, and it is sold at a 20% discount. What is the current price?
一套家具原价5000元，现八折出售，现价是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

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

<result>4_000</result>