Greenland is about 3.7 times bigger than Madagascar.

Madagascar is approximately 587,041 sq km, while Greenland is approximately 2,166,086 sq km, making Greenland 269% larger than Madagascar. Meanwhile, the population of Madagascar is ~32.7 million people (32.7 million fewer people live in Greenland).
Tip: This to-scale comparison of Madagascar vs. Greenland uses the Mercator projection, which distorts the size of regions near the poles.
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