The original price of a mobile phone is 2,400 yuan, and the price has been reduced (1/10). What is the current price of the mobile phone?
一部手机原价是2400元，现降价了(1/10)，问手机现价是多少？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">2_400 * (9/10)</gadget>
<output>2_160</output>

<result>2_160</result>