In February 2013, Xiaoli deposited 500 yuan of pocket money in the bank for a period of two years. After the expiration, she could get a total of 537.5 yuan in principal and interest. Do you know what the annual interest rate of this time deposit is? (Temporary exemption from interest tax)
2013年2月，小丽把500元零花钱存到银行，定期两年，期满后，可得本金和利息共537.5元．你知道这种定期存款的年利率是多少吗？(暂免利息税)
<gadget id="calculator">537.5 - 500</gadget>
<output>37.5</output>

<gadget id="calculator">500 * 2</gadget>
<output>1_000</output>

<gadget id="calculator">37.5 / 1_000</gadget>
<output>0.0375</output>

<result>0.0375</result>