The temperature at 6 o'clock in the morning is -2°C, and the temperature at 12:00 noon is 6°C higher than that at 6:00 am, what is the temperature at 12 o'clock in the morning?
一天早晨6时的气温是-2℃，中午12时的气温比早晨6时升高了6℃，中午12时的气温是多少℃．
<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<result>4</result>