On September 1 this year, Xiaoyu deposited the 400 yuan lucky money she had accumulated into the bank for 3 years, with an annual interest rate of 2.89%. She plans to donate the interest to the Hope Project when it expires. How much money can she donate then?
小玉今年9月1日把积攒的400元压岁钱存入银行，定期3年，年利率2.89%，准备到期时把利息捐给希望工程，到时她可捐款多少钱？
<gadget id="calculator">2.89 / 100</gadget>
<output>0.0289</output>

<gadget id="calculator">400 * 0.0289 * 3</gadget>
<output>34.68</output>

<result>34.68</result>