Aunt Zhang bought a three-year treasury bond of 5,000 yuan, with an annual interest rate of 3.85%. How much interest will she get after three years?
张阿姨购买了三年期的国库券5000元，年利率是3.85%，三年后可得利息多少元？
<gadget id="calculator">3.85 / 100</gadget>
<output>0.0385</output>

<gadget id="calculator">5_000 * 0.0385 * 3</gadget>
<output>577.5</output>

<result>577.5</result>