Can someone please clarify the precedence of terms in this question:

3x4http://upload.wikimedia.org/wikipedi...a7e578384e.png3(2+1)

Trying to understand why the 3 is multiplied by the (2+1) before the division? Is this a universally understood precedence or not? Saw on Wikipedia that Wolfram Alpha considers this not the case as a parenthesis discounts the implied multiplication???

Thanks