It depends on what you mean by "exatcly what it says".
Christians attempt to ensure they live their life like Jesus Christ whose life was shown and depicted in the New Testament. The Old Testament, although important, has many "traditions" in it which were heavily affiliated with the Jewish tradition at the time. Some beliefs even "malicious" so to speak which is why Jesus denounced the "eye for an eye" theory.
Christianity is a rather large religion and it is almost impossible to gain every answer here showing a part in one denomination of Christianity.
I don't follow every word in the Bible and I can't imagine that many Christians do too. Otherwise McDonalds and other large fast food companies would not do as good as they are doing right now.
And by reading the Bible isn't going to help much. Many books that were once in the Bible have been eradicated thanks to the Barbarians or the group (I forgot their name) that chose which books to be included in the Bible. If you look at the course of Christianity, many things have changed. Now, for some apparent reason, it is said to be a good "Christian", one must go to Church. Many religions you see today have moved so far from their original origins it's hard to understand how it moved that far.
E.g. I watched a documentary based on the History of Islam. It was a very very very good religion, where it is documented that Jews, Christians and Muslims even worshipped together in the same place because they submitted to the one God. And for some reason now today, we have ongoing wars between the Abrahamic religions.
*Edit: Although I'm a Catholic, I don't believe in the authority of the Pope.