The original price of a bicycle is 240 yuan, and now it is sold at a 20% discount. How much is the current price cheaper than the original price?
一辆自行车原价是240元，现在打八折出售，现价比原价便宜了多少元．
<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">240 * (1/5)</gadget>
<output>48</output>

<result>48</result>