<p>The <strong><span style="color:#8e44ad;">Area of a Circle</span></strong> is a mathematical classic:</p>
<p><span style="font-size:22px;"><span style="color:#27ae60;">$$area = \pi r^2$$</span></span></p>
<p><strong><span style="color:#e74c3c;">Example</span></strong></p>
<p>What is the area of a cricle with a radius of $6$?</p>
<p>$$area = \pi 6^2 = 36\pi$$</p>