Tingting's grandfather deposits 8,000 yuan of income from planting heterophylla in the bank for 2 years, with an annual interest rate of 2.75%. How much can Tingting's grandfather get back the principal and interest when it expires?
婷婷的爷爷把种太子参收入的8000存入银行，定期2年，年利率按2.75%算，到期时婷婷的爷爷可取回本金和利息一共多少元？
<gadget id="calculator">2.75 / 100</gadget>
<output>0.0275</output>

<gadget id="calculator">8_000 * 0.0275 * 2</gadget>
<output>440</output>

<gadget id="calculator">8_000 + 440</gadget>
<output>8_440</output>

<result>8_440</result>