Aunt Li deposits 1,200 yuan in the bank, and can get back 1,530 yuan when it expires. If the deposit period is five years, what is the annual interest rate? (Exemption from interest tax)
李阿姨把1200元存入银行，到期时能取回1530元．如果存期五年，年利率是多少？(免征收利息税)
<gadget id="calculator">1_530 - 1_200</gadget>
<output>330</output>

<gadget id="calculator">330 / 1_200 / 5</gadget>
<output>11/200 = around 0.055</output>

<result>11/200 = around 0.055</result>