Lao Wang deposits 2,000 yuan in the bank for a period of one year. After the maturity, he will receive a total of 2,082.8 yuan in principal and pre-tax interest. What is the annual interest rate?
老王把2000元存入银行，定期一年，到期后共获得本金和税前利息共2082.8元，年利率是多少．
<gadget id="calculator">2_082.8 - 2_000</gadget>
<output>82.8</output>

<gadget id="calculator">82.8 / 2_000 / 1</gadget>
<output>0.0414</output>

<result>0.0414</result>