Li Li bought 4,000 yuan treasury bills for three years, with an annual interest rate of 5%. After the expiration, she donated the interest to the "Hope Project" to support poor children. How much can Li Li donate to "Project Hope".
李丽买了4000元国库券，定期三年，年利率为5%，到期后她把利息捐给"希望工程"支援贫困儿童．李丽可以捐多少元给"希望工程"．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">4_000 * (1/20) * 3</gadget>
<output>600</output>

<result>600</result>