Simplify the following text for a Grade 14 native English-speaking person.
Original: Emerson Fittipaldi ( born December 12 , 1946 in SÃ # o Paulo , Brazil ) is a Brazilian automobile racing driver who throughout a long and successful career won championships in both Formula One and CART , as well as winning the Indianapolis 500 twice .
Simplified: Emerson Fittipaldi ( born December 12 , 1946 in SÃ # o Paulo , Brazil ) is a highly successful Brazilian automobile racing driver , winning championships in both Formula One and CART , and the Indianapolis 500 twice .