The original price of a printer is 3,000 yuan, and it is sold at a 20% discount. How much is the current price cheaper than the original price?
一台打印机原价3000元，按八折销售，现价比原价便宜多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3_000 * (4/5)</gadget>
<output>2_400</output>

<gadget id="calculator">3_000 - 2_400</gadget>
<output>600</output>

<result>600</result>