title: How can I install libgfortran3 in Ubuntu/Lubuntu 20.04?
body: <p>I'm using jBlas and it require libgfortran3 and tell me to install it from:</p>
  
  <pre><code>sudo apt-get install libgfortran3
  </code></pre>
  
  <p>But I'm using Lubuntu 20.04, which use the same packages as Ubuntu 20.04. I can't find the package here 
  <a href="https://packages.ubuntu.com/search?keywords=libgfortran3" rel="nofollow noreferrer">https://packages.ubuntu.com/search?keywords=libgfortran3</a></p>
  
  <p>So what should I do?</p>