A refrigerator, the original price is 2580 yuan, 20% off promotion in holiday shopping malls. If you buy such a refrigerator now, how much will you save from the original price?
一台电冰箱，原价2580元，节日商场打八折促销．现在买这样一台冰箱，将比原价节省多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2_580 * (1/5)</gadget>
<output>516</output>

<result>516</result>