Xiao Zhang deposits 3,000 yuan in the bank for a period of 3 years. When the maturity expires, he will get a total of 3,324 yuan in principal and interest. What is the annual interest rate on this savings.
小张把3000元存入银行，定期3年，到期时他获得本金和利息共3324元．这种储蓄的年利率是多少．
<gadget id="calculator">3_324 - 3_000</gadget>
<output>324</output>

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

<gadget id="calculator">324 / 9_000</gadget>
<output>9/250 = around 0.036</output>

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