A person deposits 10,000 yuan in the bank for 5 years, and the annual interest rate is 7.8%. After the maturity, he can receive the total amount of principal and after-tax interest.
某人在银行存入10000元，定期5年，年利率为7.8%，到期后他可领取本金和税后利息共是多少元．
<gadget id="calculator">7.8 / 100</gadget>
<output>0.078</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">10_000 * 5 * 0.078 * (19/20)</gadget>
<output>3_705</output>

<gadget id="calculator">10_000 + 3_705</gadget>
<output>13_705</output>

<result>13_705</result>