The original price of a TV set is 5,500 yuan, and it is now on sale at a 20% discount. What is the current price?
一种电视机原价是5500元，现在打八折出售，现价是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5_500 * (4/5)</gadget>
<output>4_400</output>

<result>4_400</result>