Xiaoming's family bought 2,500 yuan of national construction bonds, fixed for three years, with an annual interest rate of 7.11%. How much interest will be earned at maturity.
小明家买了2500元的国家建设债券，定期三年，年利率是7.11%．到期可获利息多少．
<gadget id="calculator">7.11 / 100</gadget>
<output>0.0711</output>

<gadget id="calculator">2_500 * 0.0711 * 3</gadget>
<output>533.25</output>

<result>533.25</result>