The temperature in Harbin is -20°C on a certain day, and the temperature in Kunming is 6°C on the same day. How much is the temperature difference between the two places?
某天哈尔滨的气温为-20℃，同天昆明的气温为6℃，两地气温相差多少．
<gadget id="calculator">6 - (-20)</gadget>
<output>26</output>

<result>26</result>