Uncle Wang deposits 10,000 yuan in the bank, with a deposit period of three years, an annual interest rate of 3.69%, and an interest tax of 20%. After deducting the interest tax when it is due, how much can he get the principal and interest in total?
王大爷在银行存款10000元，存期三年，年利率3.69%，利息税20%．到期时扣除利息税后，他共能获得本息多少元？
<gadget id="calculator">3.69 / 100</gadget>
<output>0.0369</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">10_000 * 0.0369 * 3 * (4/5)</gadget>
<output>885.6</output>

<gadget id="calculator">10_000 + 885.6</gadget>
<output>10_885.6</output>

<result>10_885.6</result>