Xiao Ming bought a five-year national construction bond with his 500 yuan lucky money, with an annual interest rate of 3.81%. How much is Xiao Ming's interest when it expires?
小明把他的500元压岁钱，买了五年期的国家建设债券，年利率按3.81%计算．到期时，小明的利息共有多少元？
<gadget id="calculator">3.81 / 100</gadget>
<output>0.0381</output>

<gadget id="calculator">500 * 5 * 0.0381</gadget>
<output>95.25</output>

<result>95.25</result>