Xiao Li bought a treasury bond of 1,000 yuan for a period of three years. If the annual interest rate is 2.55%, how much will he get back the principal and interest when it expires?
小李买了1000元的国库券，定期三年，如果按年利率2.55%计算，到期时他取回本金和利息一共多少元．
<gadget id="calculator">2.55 / 100</gadget>
<output>0.0255</output>

<gadget id="calculator">1_000 * 0.0255 * 3</gadget>
<output>76.5</output>

<gadget id="calculator">1_000 + 76.5</gadget>
<output>1_076.5</output>

<result>1_076.5</result>