A "viral" math problem

http://www.davidwolfe.com/answer-viral-math-problem-japan/

Uh hem, what's so viral about this? What's so hard about this? All elementary school students should be able to do this... Order of Operations is defined exactly to avoid ambiguity. Only 60% Japanese people can do this? That's pretty low.

What about Americans?

When you have an arithmetic expression to evaluate you don't go for the calculator first. You see if you can do it in-your-head first. 3 ÷ 1/3? Flip that 1/3 and multiply (divide fraction means multiply by its reciprocal). Ok it is 9. 9-9. boom. gone. Answer is 1.