The current price of a TV is 2,200 yuan, which is 300 yuan cheaper than the original price. How much discount is the current price compared with the original price? If the "Double Festival" is held, this TV will be discounted by 20% off the original price. How much is this TV cheaper than the original price during the "Double Festival"?
一台电视机现价2200元，比原价便宜了300元，现价与原价相比打了几折？如果逢"双节"，这台电视机要按原价打八折，逢"双节"这台电视机比原价便宜多少元？
<gadget id="calculator">2_200 + 300</gadget>
<output>2_500</output>

<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_500 * (1/5)</gadget>
<output>500</output>

<result>500</result>