An air conditioner originally sold at 2,800 yuan per unit, but the price was reduced by 25% for the first time and 20% for the second time. After the two price reductions, how much is each unit sold for?
一种空调，原来每台售2800元，第一次降价25%，第二次降价20%，两次降价后每台售多少元？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<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">2_800 * (3/4) * (4/5)</gadget>
<output>1_680</output>

<result>1_680</result>