title: css calc expressions not validated by w3cvalidator and not working in real life either
body: <p>why does the w3c css validator give me errors on these expressions:</p>
  
  <pre><code>#logo {
  width: calc(0.85*6.25rem);
  height: calc (10.8125rem*0.85);
  }
  
  .navpad {
  padding-top: calc(0.05*(100% - 12*1.5*1rem - (10.8125rem*0.85)));
  } 
  </code></pre>
  
  <p>thanks for any tips</p>