What is the difference between 1029 minus the sum of 145 and 2.5?
1029减去145与2.5的和，差是多少？
<gadget id="calculator">145 + 2.5</gadget>
<output>147.5</output>

<gadget id="calculator">1_029 - 147.5</gadget>
<output>881.5</output>

<result>881.5</result>