Teacher Wang deposits RMB 3,000 in the bank for a fixed period of 5 years, and can get an interest of RMB 540 when it matures. Calculate the annual interest rate.
王老师把3000元人民币存入银行，存定期5年，到期时可以获得540元的利息，求年利率．
<gadget id="calculator">540 / 3_000 / 5</gadget>
<output>9/250 = around 0.036</output>

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