In January 2007, Mr. Wang deposited 3,000 yuan in the bank for a period of 5 years. When it matures, he can get 540 yuan in interest. What is the annual interest rate?
2007年1月，王老师把3000元人民币存入银行，存期为5年，到期时可以拿到540元的利息，年利率是多少．
<gadget id="calculator">540 / 3_000 / 5</gadget>
<output>9/250 = around 0.036</output>

<result>9/250 = around 0.036</result>