&gt; If you want to contribute to open source, then please feel free to join an open source project.<p>It IS an open source project: <a href="https:&#x2F;&#x2F;github.com&#x2F;18F&#x2F;calc&#x2F;blob&#x2F;master&#x2F;LICENSE.md" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;18F&#x2F;calc&#x2F;blob&#x2F;master&#x2F;LICENSE.md</a>