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449,000,000 centimeters is about 3,500,000,000 times as long as a Grain of Sand.
In other words, it's 3,590,000,000 times the length of a Grain of Sand, and the length of a Grain of Sand is 0.0000000002790 times that amount.
(medium grain)
Composed mainly of quartz, mica, feldspar, or magnetite, a grain of sand measures an average of 0.1250 centimeters. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 1,510 centimeters in height.
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