The highest temperature in a place during the day is 30°C, and the lowest temperature at night is -3°C, what is the temperature difference between day and night in this place?
一个地方白天的最高气温是30℃，夜间最低气温是-3℃，这个地方昼夜的温差是多少℃
<gadget id="calculator">30 - (-3)</gadget>
<output>33</output>

<result>33</result>