The Huanggang Meteorological Observatory forecasted that the temperature was 26.5 degrees Celsius in the morning, 3.1 degrees Celsius higher at noon than in the morning, and 4.5 degrees Celsius lower in the evening than at noon. Question: What is the temperature in Celsius tonight?
黄冈气象台预报：某天早上气温是26.5摄氏度，中午气温比早上高了3.1摄氏度，晚上比中午降低了4.5摄氏度．请问：这天晚上的气温是多少摄氏度？
<gadget id="calculator">3.1 - 4.5</gadget>
<output>-1.4</output>

<gadget id="calculator">26.5 + (-1.4)</gadget>
<output>25.1</output>

<result>25.1</result>