Uncle Li deposits 8,000 yuan in the bank for 3 years, and the annual interest rate is calculated at 2.75%. How much is Uncle Li's principal and interest at the time of maturity?
李叔叔把8000元钱存入银行，整存整取3年，年利率按2.75%计算．到期时，李叔叔的本金和利息共多少元？
<gadget id="calculator">2.75 / 100</gadget>
<output>0.0275</output>

<gadget id="calculator">8_000 * 0.0275 * 3</gadget>
<output>660</output>

<gadget id="calculator">8_000 + 660</gadget>
<output>8_660</output>

<result>8_660</result>