Mom deposits 10,000 yuan in the bank with a deposit period of 1 year, an annual interest rate of 2.5%, and an interest tax of 20%.
妈妈把10000元存入银行，存期1年，年利率为2.5%，利息税为20%，到期时可得到和税后利息多少元．
<gadget id="calculator">2.5 / 100</gadget>
<output>0.025</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 * 0.025 * 1 * (4/5)</gadget>
<output>200</output>

<gadget id="calculator">10_000 + 200</gadget>
<output>10_200</output>

<result>10_200</result>