Xiao Ming deposits the 2,000 yuan scholarship in the bank for two years, with an annual interest rate of 4.50%. After the due date, Xiao Ming plans to donate the after-tax interest to poor students. How much did Xiao Ming donate in total? (Interest tax rate is 5%)
小明把2000元奖学金存入银行，定期两年，年利率4.50%．到期后小明准备将税后利息捐给贫困学生，小明一共捐了多少元？(利息税率为5%)
<gadget id="calculator">4.5 / 100</gadget>
<output>0.045</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">2_000 * 0.045 * 2 * (19/20)</gadget>
<output>171</output>

<result>171</result>