A TV station surveyed 100 viewers on the ratings of two types of programs. Among them, 76 people like to watch cartoons, 24 people like to watch both cartoons and news, and 20 people like neither animation nor news. How many people only like to watch the news?
某电视台向100名观众调查两类节目的收视情况，其中有76人喜欢看动画片，有24人既喜欢看动画片又喜欢看新闻，有20人既不喜欢看动画也不喜欢看新闻，只喜欢看新闻的有多少人？
<gadget id="calculator">76 - 24</gadget>
<output>52</output>

<gadget id="calculator">100 - 52 - 20 - 24</gadget>
<output>4</output>

<result>4</result>