To calculate \( 3 \times \sqrt{27} \), we can simplify \(\sqrt{27}\) first.
\[ \sqrt{27} = \sqrt{9 \times 3} = \sqrt{9} \times \sqrt{3} = 3\sqrt{3} \]
Now, substituting back into the original calculation:
\[ 3 \times \sqrt{27} = 3 \times (3\sqrt{3}) = 9\sqrt{3} \]
So, \( 3 \times \sqrt{27} = 9\sqrt{3} \).