Uncle Liu bought 6,000 yuan of national construction bonds, fixed for three years, with an annual interest rate of 2.89%. Uncle Liu plans to donate the interest to the Hope Project. How much can he donate?
刘大爷买了6000元国家建设债券，定期三年，年利率是2.89%，刘大爷计划把利息捐给希望工程，他能捐多少元．
<gadget id="calculator">2.89 / 100</gadget>
<output>0.0289</output>

<gadget id="calculator">6_000 * 0.0289 * 3</gadget>
<output>520.2</output>

<result>520.2</result>