<http://schema.org/description>
"Google has upgraded their calculator in the search results.  A couple days ago, if you searched for 2+2, it would show the answer as being 4.  Now Google shows 4 but also gives you a full sized calcul"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-calculator-15484.html>