A person buys 1,000 yuan of three-year treasury bonds with an annual interest rate of 2.89%. How much will he get in total in principal and interest when it matures?
某人买了1000元定期三年，年利率为2.89%的国债券，到期他一共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">1_000 * 0.0289 * 3</gadget>
<output>86.7</output>

<gadget id="calculator">1_000 + 86.7</gadget>
<output>1_086.7</output>

<result>1_086.7</result>