<p>Applying the method of <a href="https://en.wikipedia.org/wiki/Buffon%27s_needle_problem">Buffon’s needle</a>, we get the <strong>approximation</strong>)</p>
<p>Applying the method of <a href="https://en.wikipedia.org/wiki/Buffon%27s_needle_problem">Buffon’s needle</a>, we get the <strong>approximation</strong></p>