Multiply and Simplify.

(6-6√6) (5+4√6)

I'm pretty sure the answer is -128.70 but I'm not sure pls help i have to show my work

6(1-√6) (5+4√6)

6 [ 5 - 5√6 + 4√6 - 24 ]
6 [ -19 - √6 ]
-6 ( 21.45)
-128.7
we agree