For an upper triangular matrix T=(4270−35006)T = \begin{pmatrix} 4 & 2 & 7 \\ 0 & -3 & 5 \\ 0 & 0 & 6 \end{pmatrix}T=4002−30756, what is det(T)\det(T)det(T)?
−72-72−72
727272
−15-15−15
303030