Solve for a a=pi*4^2

$a = π \cdot 4^{2}$

Raise $4$ to the power of $2$ .

$a = π \cdot 16$

Move $16$ to the left of $π$ .

$a = 16 π$

The result can be shown in multiple forms.

Exact Form:

$a = 16 π$

Decimal Form:

$a = 50.26548245 \dots$

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