Uncle Li bought a five-year national bond of 20,000 yuan, with an annual interest rate of 4.14%. How much is Uncle Li's principal and interest at the time of maturity?
李叔叔购买了五年期的国债卷20000元，年利率是4.14%．到期时，李叔叔的本金和利息共有多少元？
<gadget id="calculator">4.14 / 100</gadget>
<output>0.0414</output>

<gadget id="calculator">20_000 * 0.0414 * 5</gadget>
<output>4_140</output>

<gadget id="calculator">20_000 + 4_140</gadget>
<output>24_140</output>

<result>24_140</result>