On a certain day in Jilin, the highest temperature is 4°C, and the lowest temperature is -3°C, then, what is the temperature difference in Jilin on this day in °C?
吉林某天最高温度是4℃，最低温度是-3℃，那么，吉林这天的温差是多少℃．
<gadget id="calculator">4 - (-3)</gadget>
<output>7</output>

<result>7</result>