Master Wang deposits 37,500 yuan in the bank for two years, the annual interest rate is 2.25%, and the interest tax is 20%. After the maturity, he can get how much after-tax interest.
王师傅把37500元钱存入银行，定期二年，年利率是2.25%，利息税为20%，到期后他可得税后利息多少元．
<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">37_500 * 2 * 0.0225 * (4/5)</gadget>
<output>1_350</output>

<result>1_350</result>