Find the unit digit of A if Digit: \( 3 \times 3 \times 3 \times \ldots \times 3 \times 6 \times 6 \times 6 \times \ldots \times 6 \)

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Find the unit digit of A if

Digit: Chữ số

\( 3 \times 3 \times 3 \times \ldots \times 3 \times 6 \times 6 \times 6 \times \ldots \times 6 \)
\(\phantom{100's} \)

\( 100's \)