Xiaolan's family deposited 20,000 yuan in the bank last year, fixed for one year, with an annual interest rate of 2.25%, and 20% interest tax was deducted. How much interest can they earn when it matures this year?
小兰家去年20000元钱存入银行，定期一年，年利率是2.25%，扣除利息税20%，今年到期时，可获利息多少元？
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">20_000 * 0.0225 * 1</gadget>
<output>450</output>

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

<gadget id="calculator">450 * (1/5)</gadget>
<output>90</output>

<gadget id="calculator">450 - 90</gadget>
<output>360</output>

<result>360</result>