The original price of an electric fan is 300 yuan, and the price has been reduced twice. The first time it is sold at a 20% discount, and the second time it is sold at a 10% discount. What is the final price of this electric fan?
一种电风扇原价300元，先后两次降价，第一次按八折出售，第二次降价10%，这种电风扇最后的价钱是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</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 * (4/5) * (9/10)</gadget>
<output>216</output>

<result>216</result>