Original: Out of these , three are major metropolitan areas , each of which have over 3 million people ; the Los Angeles area with over 12 million inhabitants , the Riverside-San Bernardino area with over 4 million inhabitants , and the San Diego area with over 3 million inhabitants .
Simplified: The definitions of it vary , but it usually contains the area around Los Angeles and San Diego , as well as the '' Inland Empire '' of San Bernardino and Riverside Counties .