Artificial intelligent assistant

What is WOP in math or when $2 + 2 * 2$ is equal 8? I know that this sounds dumb (I'm kind of math ignorant), but for past 30 years of my life I was more than sure that there is only one solution to this equation: $2 + 2 * 2 = 6$ Until I was hit with "welcome screen" in Mobi Calculator asking me (?)... eee... what kind of math do I want to use in it: ![enter image description here]( and suggesting (?) that... in certain situations $2 + 2 * 2 = 8$ is true. What is WOP or what am I missing here?

I think it can means "without operations priority", doing operations one by one from left to right.

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