Scaled, Transposed, Swapped

Let

$A = \begin{pmatrix} 2 & 1 & 4 \\ 3 & 0 & 5 \\ 1 & 2 & 6 \end{pmatrix}$

A new matrix $B$ is built from $A$ by applying these three operations, in this order:

Step	Operation
1	Transpose $A$
2	Multiply every entry of the result by $3$
3	Swap the first and third rows

What is $\det(B)$ ?

The answer is an exact integer — enter it with no decimal places, and include a minus sign if it is negative.