Apple just announced its 5th stock split in history. Here's what that means -- and how many shares you'd have if you bought one before its first split in 1987. (AAPL)

REUTERS/Edgar Su Apple announced its fifth stock split in its history on Thursday, as the iPhone maker's stock price marched to the $400 level. Apple said a stock split would allow it to "appeal to a broader base of investors." The move will appeal to investors who have a difficult time buying a stock that sports a triple digit price. On August 24, Apple investors will receive three additional shares for every one share they own, while the stock price will be divided by four, bringing shares bac...