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267.860 megatonnes is about 1,500 times as heavy as The Sears Tower.
In other words, it's 1,327 times the weight of The Sears Tower, and the weight of The Sears Tower is 0.0007536 times that amount.
(officially "Willis Tower" as of 2009) (Chicago, Illinois)
The Willis Tower weighs approximately 0.20180 megatonnes. The outer wall surface of the Tower is covered with black anodized aluminum panels which would total 110,000 sq. m (28 acres) if laid out together.
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