Mom deposits 10,000 yuan in the bank with a deposit period of 2 years and an annual interest rate of 2.25%. When the interest is due, 20% of the interest tax will be deducted. How much interest can I get after tax?
妈妈将10000元存入银行，存期2年，年利率为2.25%，到期取息时，需扣除利息税20%，那么税后可得利息多少元？
<gadget id="calculator">2.25 / 100</gadget>
<output>0.0225</output>

<gadget id="calculator">10_000 * 0.0225 * 2</gadget>
<output>450</output>

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

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">450 * (4/5)</gadget>
<output>360</output>

<result>360</result>