Which XXX calculates the area using the CalcSquare$()$ method? The formula to calculate the area of a circle ispi $*$ r$2$

$.$

public static double calcSquare$($double x$)\{$

return x$*$x;

$\}$

public static double calcArea$($double r$)\{$

final double PI$\_$VAL $=3\mathrm{.}14159265$;

XXX;

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public static void main$($String args$[])\{$

System.out.println$($calcArea$(5\mathrm{.}0))$;

$\}$