The original price of an electric fan is 300 yuan, and it is sold at (9/10) for the first time, and the price is reduced by 10% for the second time. How much is the current price of this fan?
一种电扇原价300元，第一次按(9/10)出售，第二次再降价10%．这种电扇现价多少元．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">10 / 100</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">300 * (9/10) * (9/10)</gadget>
<output>243</output>

<result>243</result>