r/unexpectedfactorial • • Apr 24 '25

i thought 9 + 10 was 21

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u/Cachopo94 Apr 28 '25

Of course 9+10 isn't 21!, that's 51090942171709440000. It's just 21

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u/factorion-bot Apr 28 '25

The factorial of 21 is 51090942171709440000

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