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Anonymous
400 of them because a decade is 10 years and 400*10 = 4,000 years which is 4 millennial
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4,000
4000 duh 🙄
4000
5000000
900
4 decades, 4 years
A thousand years
1 millennium = 1,000 years so 3 millennia = 3,000 years. Simple!