On a certain day, the lowest temperature in Shenzhen is 9℃, and the lowest temperature in Beijing is -15℃. How much higher is the lowest temperature in Shenzhen than in Beijing?
某日深圳最低气温9℃，北京最低气温-15℃，深圳最低气温比北京高多少℃
<gadget id="calculator">9 - (-15)</gadget>
<output>24</output>

<result>24</result>