Xiaoli's mother bought 3,000 yuan of national bonds for 3 years. If the annual interest rate is 6.15%, how much interest can she earn when it matures?
小丽的妈妈买了3000元的国债券，定期3年，如果年利率是6.15%，到期时，能获利息多少元？
<gadget id="calculator">6.15 / 100</gadget>
<output>0.0615</output>

<gadget id="calculator">3_000 * 0.0615 * 3</gadget>
<output>553.5</output>

<result>553.5</result>