title: Sass is concatenating instead of adding?
body: <p>I need to define a width in my SCSS code as so:</p>
  
  <pre><code>#example {
    width: $currentWidth + 349 !important;
  }
  </code></pre>
  
  <p>Where <code>$currentWidth</code> is defined by the loop.</p>
  
  <p>However, Sass always ends up concatenating the two numbers instead of doing the arithmetic.</p>
  
  <p>I have also tried:</p>
  
  <p><code>width: #{$currentWidth + 349}px !important;</code></p>
  
  <p>Which still results in concatenation.</p>
  
  <p>I'm wondering what I'm doing wrong? I know this is incredibly basic, but I also can't seem to find good information on how Sass handles arithmetic</p>