Uncle Wang deposits 5,000 yuan in the bank, the annual interest rate is 2.25%, assuming that the interest tax is 20%, how much after-tax interest can he receive after one year.
王叔叔到银行存款5000元，年利率是2.25%，假设利息税为20%，一年后可领到税后利息多少元．
<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">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5_000 * 1 * 0.0225 * (4/5)</gadget>
<output>90</output>

<result>90</result>