Square and Square Roots

goals
Find the square roots of the following numbers by prime factorization method.
Each of the following numbers is a perfect square-whose square is the given along with the number in each case:
Evaluate:
$\left( i \right)\,\,\,3\sqrt { - \frac{{512}}{{343}}}$
$\left( {ii} \right)\,\,\,3\sqrt {2.197}$
Find whether the square of the following numbers are even or odd?
$8204$
Find : $64^{\frac{1}{2}}$