$\"\"$

The value of $\"\"$ is $\"\"$ .

$\"\"$ . (By using a calculator)

Therefore, the value of $\"\"$ is $\"\"$ .

Stirling $\"\"$ s formula : $\"\"$ .

Substitute $\"\"$ in the above formula.

$\"\"$

$\"\"$ .

Thus, using Stirling $\"\"$ s formula the value of $\"\"$ is $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .

Using Stirling $\"\"$ s formula the value of $\"\"$ is $\"\"$ .