The refrigerator with the original price of 2,800 yuan is sold at a 20% discount. How much can the customer save by buying this refrigerator?
原价2800元的冰箱，促销八折销售，顾客购买此冰箱可节省多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2_800 * (4/5)</gadget>
<output>2_240</output>

<gadget id="calculator">2_800 - 2_240</gadget>
<output>560</output>

<result>560</result>