Uncle Li bought 30,000 yuan of 5-year national construction bonds with an annual interest rate of 3.14%. How much is Uncle Li's principal and interest at the time of maturity?
李叔叔买了30000元定期5年的国家建设债券，年利率为3.14%．到期时，李叔叔的本金和利息共有多少元？
<gadget id="calculator">3.14 / 100</gadget>
<output>0.0314</output>

<gadget id="calculator">30_000 * 0.0314 * 5</gadget>
<output>4_710</output>

<gadget id="calculator">30_000 + 4_710</gadget>
<output>34_710</output>

<result>34_710</result>