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380 quadrillion.

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1 billion = 10 to power 12 (according to SI units)

12 billion = 12 x 10 to power 12

1 year = 86400 x 365 = 31536000 seconds

12 billion = 12 to power 12 x 31536000 = 3.78432 E20 or 378.432 trillion

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10y ago

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