The price of a mobile phone is 2300 yuan, how much is the price after 15% off.
一款手机的售价为2300元，八五折后的售价为多少元．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">3_200 * (17/20)</gadget>
<output>2_720</output>

<result>2_720</result>