Complex sentence: Since late December 2007 a A $100 million upgrade saw the centre's owners extend Chadstone's lettable area to 190,000 m², with the centre reclaiming the title as the largest shopping centre in Australia.
Split into simpler sentences: Since late December 2007 a A $100 million upgrade saw the centre's owners extend Chadstone's lettable area to 190,000 m². The result of this is that Chadstone resumes it's title as the largest shopping centre in Australia.