The annual interest rate of a one-year fixed deposit is 2.25%, and the deposit of 10,000 yuan will pay interest tax at 20% after one year. How much interest tax should be paid?
一年定期存款的年利率是2.25%，10000元的存款一年以后按20%缴纳利息税，应交纳利息税多少元？
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">10_000 * 0.0225 * 1 * (1/5)</gadget>
<output>45</output>

<result>45</result>