If the temperature in a certain place is 3°C above zero at noon, it is recorded as +3°C, and it drops by 7°C in the evening, so what is the temperature in the area in the evening?
某地某天的气温中午时是零上3℃，记作+3℃，到傍晚时下降了7℃，那么该地区傍晚时的气温记作多少．
<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<result>4</result>