Grandma Wang went to the bank to deposit 20,000 yuan of regular savings for one year on May 1, with an annual interest rate of 1.98% and an interest tax of 20%.
王奶奶5月1日去银行存了一年定期储蓄2万元，年利率1.98%，利息税20%，她到期可得本金和税后利息共多少元．
<gadget id="calculator">2 * 10_000</gadget>
<output>20_000</output>

<gadget id="calculator">1.98 / 100</gadget>
<output>0.0198</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">20_000 * 0.0198 * 1 * (4/5)</gadget>
<output>316.8</output>

<gadget id="calculator">20_000 + 316.8</gadget>
<output>20_316.8</output>

<result>20_316.8</result>