The annual interest rate is 3.5%, the income tax is 20%, and Dad saves 10,000 yuan, how much money can he get after one year?
年利率3.5%，所得税为20%，爸爸存10000元，一年后可以取得的钱多少元？
<gadget id="calculator">3.5 / 100</gadget>
<output>0.035</output>

<gadget id="calculator">10_000 * 0.035 * 1</gadget>
<output>350</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">350 * (4/5)</gadget>
<output>280</output>

<gadget id="calculator">10_000 + 280</gadget>
<output>10_280</output>

<result>10_280</result>