How to calculate factorial number

Can you suggest how can I calculate factorial
Any simple way is there to find factorial

Show me 18! Factorial then I see
I mean to say how to find 18!
Please write one more line to answer the factorial of 18

18! = 6402373705728000
How can I find this.

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According to this link, there’s (a) one slightly easier method, and (b) one approximate method:
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To find the easier method, search for:

  • I see that this is an old question…

The approximate method is just under that.

Thanks.

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