Call center employees have to deal with one bazillion Karens, but this one in particular left the call operator with a huge grin. In the r/talesfromcallcenters subreddit, one brave phone operator shared this tale of stunning ignorance . Maybe if Karen reads this story now, she'll finally understand how badly she botched the math in this equation. As the OP tells it, this Karen went on vacation and ran up a lot of money in roaming fees. Say you're on a tropical island and you check Facebook – no…