Quebec is about 1.6 times bigger than South Australia.

South Australia is approximately 984,321 km² (380,048 sq mi), while Quebec is approximately 1,542,056 km² (595,391 sq mi), making Quebec 57% larger than South Australia.
Tip: This to-scale comparison of South Australia vs. Quebec uses the Mercator projection, which distorts the size of regions near the poles.
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