Sanjay's father bought a mobile phone with an original price of 3,200 yuan. The current price is only 15% off. How much is it cheaper than the original price?
桑杰的爸爸买了一部手机，原价3200元，现价只花了八五折的钱，比原价便宜了多少钱？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">3_200 * (3/20)</gadget>
<output>480</output>

<result>480</result>