Merge pull request #2584 from mgreter/bugfix/issue-2582

Reduce units after each number operation

Author: mgreter

src/eval.cpp

@@ -1562,6 +1562,7 @@ namespace Sass {
       v->value(ops[op](lv, rn.value() * f));
     }
 
+    v->reduce();
     v->pstate(pstate);
     return v.detach();
   }