If you deposit 10,000 yuan for one year with an annual interest rate of 3.5%, how much will you get for the principal and after-tax interest?
把10000元钱存定期一年，年利率为3.5%，到期可获得本金和税后利息一共多少元？
<gadget id="calculator">3.5 / 100</gadget>
<output>0.035</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 * 0.035 * 1 * (4/5)</gadget>
<output>280</output>

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

<result>10_280</result>