title: Previous cell value before some formula changed it
body: <p>Is it possible to use previous cell value before some fomula changed that value into something else?</p>
  
  <p>For example:</p>
  
  <pre><code>A1=1.78541
  A1=trunc(1.78541)
  </code></pre>
  
  <p>Is it still possible for me to use the previous value A1=1.78541?</p>
  
  <p>I know that I can have 2 cells so I can use in this example both values, but that's not what I want. I want to have 1 cell and use both values: 1.78541 and trunc(1.78541).</p>