In stock trading, every time you buy or sell a stock, you must pay stamp duty and handling fee at 0.2% and 0.35% of the transaction amount respectively. In August, Mr. Chen bought 3,000 shares of a technology stock at a price of 10.65 yuan per share. On December 31, he sold all these stocks at a price of 13.86 yuan per share. How much did Mr. Chen earn from trading this stock?
在股票交易中，每买进或卖出一种股票，都必须按成交金额的0.2%和0.35%分别缴纳印花税和手续费．陈老师8月份以每股10.65元的价格买进一种科技股票3000股，12月31日以每股13.86元的价格将这些股票全部卖出，陈老师买卖这种股票一共赚了多少元．
<gadget id="calculator">13.86 - 10.65</gadget>
<output>3.21</output>

<gadget id="calculator">3.21 * 3_000</gadget>
<output>9_630</output>

<gadget id="calculator">0.2 / 100</gadget>
<output>0.002</output>

<gadget id="calculator">0.35 / 100</gadget>
<output>0.0035</output>

<gadget id="calculator">0.002 + 0.0035</gadget>
<output>0.0055</output>

<gadget id="calculator">10.65 * 3_000 * 0.0055</gadget>
<output>175.725</output>

<gadget id="calculator">13.86 * 3_000 * 0.0055</gadget>
<output>228.69</output>

<gadget id="calculator">175.725 + 228.69</gadget>
<output>404.415</output>

<gadget id="calculator">9_630 - 404.415</gadget>
<output>9_225.585</output>

<result>9_225.585</result>