title: Performing arithmetic operation in YAML?
body: <p>Sometimes I have to specify the time (in seconds) in the configuration file, and it's quite annoying to write exact seconds amount - instead I would like to perform arithmetics so I could use: </p>
  
  <pre><code>some_time: 1 * 24 * 60 * 60
  </code></pre>
  
  <p>instead of exact:</p>
  
  <pre><code>some_time: 86400
  </code></pre>
  
  <p>Unfortunately, while using this line: <code>some_time: 1 * 24 * 60 * 60</code>, it will treat that configuration line as a string. Of course, I can use - <code>eval(config['some_time'])</code> but I am rather wondering if that is possible to perform arithmetics in YAML?</p>