Amazonia is the largest rainforest of South America, and it covers an are ___ about 6.5 million square kilometers

Amazonia is the largest rainforest of South America, and it covers an are ___ about 6.5 million square kilometers

ایمیزونیا جنوبی امریکہ کا سب سے بڑا برساتی جنگل ہے، اور یہ ___ تقریباً 6.5 ملین مربع کلومیٹر پر محیط ہے۔
Explanation

"of" is used as a preposition here which means: expressing the relationship between a scale or measure and a value.

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