The temperature of a certain day in Beijing: the minimum temperature is -3°C, the maximum temperature is 3°C, what is the difference between the minimum and maximum temperature of this day?
北京某天的气温：最低温度-3℃，最高气温是3℃，这天的最低和最高温差是多少℃
<gadget id="calculator">3 - (-3)</gadget>
<output>6</output>

<result>6</result>