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400,000,000 tonnes is about 70,000,000,000,000 times as heavy as a Quarter.
In other words, it's 70,550,000,000,000 times the weight of a Quarter, and the weight of a Quarter is 0.000000000000014170 times that amount.
(United States quarter-dollar coin) (a.k.a. Quarter dollar, a.k.a. America the Beautiful quarter, a.k.a. two bits)
The America the Beautiful series quarters, which began to enter circulation in 2017, weigh 0.000005670 tonnes each. In answer to the common riddle, there are 119 ridges around the edge of the coin in its current design.
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