To calculate \( \frac{1}{3} \times \frac{1}{3} \times \frac{1}{3} \times \frac{1}{3} \), you can multiply the fractions together:
\[ \frac{1}{3} \times \frac{1}{3} = \frac{1 \times 1}{3 \times 3} = \frac{1}{9} \]
Then you multiply \( \frac{1}{9} \) by \( \frac{1}{3} \) again:
\[ \frac{1}{9} \times \frac{1}{3} = \frac{1 \times 1}{9 \times 3} = \frac{1}{27} \]
So the final answer is \( \frac{1}{27} \).