$\"\"$

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

$\"\"$ (By using 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 $\"\"$ .