title: How to center floating divs?
body: <p>I want to center the three divs that appear in the mockup below (all have "float:left").
  Is this possible?</p>
  
  <p>I don't mind having wrapper-divs.</p>
  
  <p>Text-align:center and display:inline-block won't work with the code I have.</p>
  
  <p><img src="https://i.stack.imgur.com/z1hTG.png" alt="enter image description here"></p>