Uncle Wang bought 3,000 yuan of national debt in 2007, fixed for 3 years, and the annual interest rate of the three-year national debt is 5.74%. When it expires, how much money can Uncle Wang get back? (Treasury bonds are exempt from paying interest tax)
王叔叔2007年买了3000元国债，定期3年，三年国债的年利率是5.74%．到期时，王叔叔可以取回多少元钱．(国债免交利息税)
<gadget id="calculator">5.74 / 100</gadget>
<output>0.0574</output>

<gadget id="calculator">3_000 * 0.0574 * 3</gadget>
<output>516.6</output>

<gadget id="calculator">3_000 + 516.6</gadget>
<output>3_516.6</output>

<result>3_516.6</result>