<body>
  We love coffee
  <p class="slogan">We love coffee</p>  
</body>
body {
  font-size: 16px;
}
.slogan {
  /* Evaluates to 19.2 px */
  font-size: 1.2em;
  /* Evaluates to 23.04 px unexpectly */
  padding: 1.2em;
  background-color: #ccc;
}

External CSS

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External JavaScript

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