According to data records, the historical highest temperature in the urban area of Anqing City is 42°C, and the historical lowest temperature is minus 12°C. What is the difference in °C between the two.
据资料记载，安庆市城区历史最高气温是42℃，历史最低气温是零下12℃．两者相差多少℃．
<gadget id="calculator">42 - (-12)</gadget>
<output>54</output>

<result>54</result>