Li Ming deposited 2,500 yuan in the bank on February 1 last year, with a deposit period of 2 years and an annual interest rate of 2.79%. How much can he get back the principal and interest when the loan is due?
李明去年2月1日把2500元钱存入银行，存期2年，年利率是2.79%．到期时，他一共可以取回本金和利息多少元？
<gadget id="calculator">2.79 / 100</gadget>
<output>0.0279</output>

<gadget id="calculator">2_500 * 0.0279 * 2</gadget>
<output>139.5</output>

<gadget id="calculator">139.5 + 2_500</gadget>
<output>2_639.5</output>

<result>2_639.5</result>