Aunt Zhang has deposited 20,000 yuan in education deposits for her son. The deposit period is 2 years and the annual interest rate is 5.4%.
张阿姨给儿子存了2万元教育存款，存期为2年，年利率为5.4%，到期后，她准备把所得利息捐给"希望工程"，她可捐多少元．
<gadget id="calculator">2 * 10_000</gadget>
<output>20_000</output>

<gadget id="calculator">5.4 / 100</gadget>
<output>0.054</output>

<gadget id="calculator">20_000 * 0.054 * 2</gadget>
<output>2_160</output>

<result>2_160</result>