box size fix

Author: sacjoshi

concrete-calculator.html

@@ -82,7 +82,7 @@ <h3 class="box-title">Concrete Calculator</h3>
                             </div>
                         </div>
                     </div>
-                    <div class="col-md-4">
+                    <div class="col-md-6">
                         <div class="box box-success">
                             <div class="box-header with-border">
                                 <h3 class="box-title">Calculated Results</h3>