title: How to install libgfortran.so.3 on ubuntu 20.04
body: <p>When I try to install <code>libgfortran.so.3</code> on Ubuntu 20.04 using:</p>
  <pre><code>sudo-apt get install libgfortran3  
  </code></pre>
  <p>it shows:</p>
  <pre><code>E: Unable to locate package libgfortran3
  </code></pre>
  <p>How can I install Fortran on 20.04?</p>