Dad bought 4,000 yuan of national bonds, fixed for five years, with an annual interest rate of 2.89%, how much will he get in principal and interest when it matures.
爸爸买了4000元国债券，定期五年，年利率2.89%，到期他可获得本金和利息共多少元．
<gadget id="calculator">2.89 / 100</gadget>
<output>0.0289</output>

<gadget id="calculator">4_000 * 0.0289 * 5</gadget>
<output>578</output>

<gadget id="calculator">4_000 + 578</gadget>
<output>4_578</output>

<result>4_578</result>