Perform the following operations on the matrix

⎡ 3  4   45⎤
⎢ 7  8  105⎥
⎣13  2  195⎦
1. Add the third row to the second row.
2. Subtract the third column from the first column. 

The determinant of the resultant matrix is _____________.

0

last column is a multiple of first column. If we multiply 15 with first column, we get the third column.