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chromium/third_party/blink/web_tests/external/wpt/css/css-sizing/aspect-ratio/floats-aspect-ratio-001-ref.html 

<!DOCTYPE html>
<title>CSS aspect-ratio reference: block formatting context with floats</title>

<div style="width: 200px; border: solid 1px; display: flow-root;">
  <div style="float: left; width: 50px; height: 50px; background: lime;"></div>
  <div style="float: right; width: 50px; height: 50px; background: hotpink;"></div>
  <div style="float: left; width: 160px; height: 50px; background: aqua;"></div>
  <div style="float: right; width: 40px; height: 40px; background: orange;"></div>
</div>