Xiaogang deposits the 4,000 yuan lucky money he got in the bank, and deposits and withdraws it in lump sum for 2 years. If the annual interest rate is 4.25%, how much will Xiaogang's principal and interest total when it matures?
小刚把得到的4000元压岁钱存入银行，整存整取2年，如果按年利率4.25%计算，到期时，小刚的本金和利息共多少元？
<gadget id="calculator">4.25 / 100</gadget>
<output>0.0425</output>

<gadget id="calculator">4_000 * 0.0425 * 2</gadget>
<output>340</output>

<gadget id="calculator">4_000 + 340</gadget>
<output>4_340</output>

<result>4_340</result>