Xiao Ming deposits the 2,000 yuan scholarship in the bank for two years, with an annual interest rate of 4.50%. After the expiration date, Xiao Ming plans to donate the interest to poor students. How much did Xiao Ming donate in total?
小明把2000元奖学金存入银行，定期两年，年利率4.50%．到期后小明准备将利息捐给贫困学生，小明一共捐了多少元？
<gadget id="calculator">4.5 / 100</gadget>
<output>0.045</output>

<gadget id="calculator">2_000 * 0.045 * 2</gadget>
<output>180</output>

<result>180</result>