Mr. Zhang deposits 20,000 yuan in the bank, deposits and withdraws for one year, and the annual interest rate is calculated at 2.50%. How much can the principal and after-tax interest be withdrawn after maturity? (Pay interest tax at 5%)
张老师在银行存入20000元钱，整存整取一年，年利率按2.50%算，到期后可取出本金和税后利息共多少元？(按5%缴纳利息税)
<gadget id="calculator">2.5 / 100</gadget>
<output>0.025</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">20_000 * 0.025 * 1 * (19/20)</gadget>
<output>475</output>

<gadget id="calculator">475 + 20_000</gadget>
<output>20_475</output>

<result>20_475</result>