Xiaodong deposits the New Year's money 500 yuan in the bank on a regular basis for one year. If the annual interest rate is calculated at 2.25%, what is the total amount of principal and interest that Xiaodong can get back from the bank at maturity.
小东把压岁钱500元存入银行，定期一年．如果年利率按2.25%计算，到期时小东可从银行取回本金和利息共多少元．
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">500 * 0.0225 * 1</gadget>
<output>11.25</output>

<gadget id="calculator">500 + 11.25</gadget>
<output>511.25</output>

<result>511.25</result>