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267.860 megatonnes is about 60,000,000,000,000,000 times as heavy as a Grain of Sand.
In other words, it's 61,000,000,000,000,000.0000000000000000000 times the weight of a Grain of Sand, and the weight of a Grain of Sand is 0.0000000000000000160 times that amount.
(medium grain)
With tremendous variety in the size of grain and the component material, grains of sand weigh an average of 0.00000000000000440 megatonnes. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 15.10 m (49.55 ft) in height.
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