Re-direct ".html" to "/"

In my Blog (http://ordealoftheunion.com/)
My blog was previously hosted on Blogger and then was changed to a self hosted wordpress.org blog, Lots of things (like Permalinks) remained static until they were re-indexed by Google. What i noticed is that someone links with”.html” re-directed to the 404 Page instead of the new permalink structure in wordpress. for example when i clicked on an article from an old link ending in “.html” it re-directed me to the 404 page instead of the actual article (http://ordealoftheunion.com/2012/05/barack-kingfish-obama-for-president.html) Which no longer works, since the permalinks changed the article is now located at (http://ordealoftheunion.com/2012/05/barack-kingfish-obama-for-president/) to summarize how can i get .html to re-direct to “/” ?

Many Thanks

– Ruslan.K