Mom bought 300 yuan of national construction bonds for three years. If the annual interest rate is 7.11%, what is the total amount of principal and interest that can be obtained at maturity?
妈妈买了300元国家建设债券，定期三年．如果年利率是7.11%，到期时可以获得本金和利息一共多少元？
<gadget id="calculator">7.11 / 100</gadget>
<output>0.0711</output>

<gadget id="calculator">300 * 0.0711 * 3</gadget>
<output>63.99</output>

<gadget id="calculator">300 + 63.99</gadget>
<output>363.99</output>

<result>363.99</result>