On a certain day, the minimum temperature in Huangzhou is 9°C, and the minimum temperature in Beijing is -15°C. How much higher is the minimum temperature in Huangzhou than in Beijing?
某日黄州最低气温9℃，北京最低气温-15℃，黄州最低气温比北京高多少
<gadget id="calculator">9 - (-15)</gadget>
<output>24</output>

<result>24</result>