A desktop computer, whose original price is 3000 yuan, is sold at a reduced price of 50 yuan and then 20%. What is the current price?
一个台式电脑，原价3000元，先减价50元，又降价20%出售，现在售价多少元．
<gadget id="calculator">3_000 - 50</gadget>
<output>2_950</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_950 * (4/5)</gadget>
<output>2_360</output>

<result>2_360</result>