Thread: finding determinant

the determinant is of this matrix is 7

| a b c|
| d e f | = 7, find
| g h i |

| d e f |
| g h i |
| a b c |

I'm not sure what am I suppose to do exactly. Am I suppose to find what each letters is?

Never mind, i figured it out. I just had to use the elementary row operations.