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- <!DOCTYPE HTML>
- <style>
- div { background: yellow }
- span { background: aqua }
- div { font-size: 12px; width: 450px }
- </style>
- <!--
- In a 450px container, the minimum font size at 15em per line is 30px.
- This means we map 0px-45px into 30px-45px, so 12px gets mapped to 34px.
- -->
- <div><span>Hello world</span></div>
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