title: How to get the exact value of factorial(100)
body: <p>When I run <code>factorial(100)</code> in the console, I get</p>
  
  <pre><code>factorial(100)
  # [1] 9.332622e+157
  </code></pre>
  
  <p>But I want to see the exact value of <code>factorial(100)</code>. How would I do it?</p>