(a \* b) \* c is equal to (b \* a) \* c. And floating-point arithmetic is commut...

(a * b) * c is equal to (b * a) * c. And floating-point arithmetic is commutative, according to Eric Lippert (http://blogs.msdn.com/b/ericlippert/archive/2005/01/20/fun-w... ) and an university professor (http://www.cs.uiuc.edu/class/fa07/cs498mjg/notes/floating-po... ). Also according to IEEE 754, which I can't seem to find online.