Xiaoxiao deposited 2,000 yuan in the bank for three years, with an annual interest rate of 4.2%. After maturity, how much is the principal and interest payable by the bank to Xiaoxiao?
笑笑在银行存了2000元人民币，定期三年，年利率是4.2%．到期后，银行应付给笑笑本金和利息一共多少元？
<gadget id="calculator">4.2 / 100</gadget>
<output>0.042</output>

<gadget id="calculator">2_000 * 0.042 * 3</gadget>
<output>252</output>

<gadget id="calculator">2_000 + 252</gadget>
<output>2_252</output>

<result>2_252</result>