Grandma Chen deposited 4,000 yuan in the bank on December 25, 2015, for three years, with an annual interest rate of 3.25%. After the expiration, how much yuan can Grandma Chen get back in total?
陈奶奶2015年12月25日把4000元存入银行，定期三年，年利率是3.25%．到期后，陈奶奶一共可取回多少元？
<gadget id="calculator">3.25 / 100</gadget>
<output>0.0325</output>

<gadget id="calculator">4_000 * 0.0325 * 3</gadget>
<output>390</output>

<gadget id="calculator">4_000 + 390</gadget>
<output>4_390</output>

<result>4_390</result>