Is it possible to do arithmetic in Object keys?
<p>I have an object where the keys are arbitrary values:</p>

<pre><code>{
  1300: 'banana',
  267000: 'cheese',
  4000000: 'goat'
}
</code></pre>

<p>In some cases it would be clearer to others if I do some math, eg:</p>

<pre><code>12 * 1000 * 1000: 'horse',
</code></pre>

<p><strong>Is doing maths in keys possible in JavaScript?</strong></p>

<p>I have tried:</p>

<pre><code>(12 * 1000 * 1000): 'horse',
</code></pre>

<p>But it's a syntax error.</p>