Hah. magnetised screwdriver.
evil little puzzle really. the only reason i solved it was by trial an error checking over every item possible with the cups game. which i figured was the only logical place i would manage to proceed in the chapter. (i wish i would have been smart enough to have at least an inkling though
)
nice though. not much time to figure out what to do with the calculator. but at least i have something new to wander arcadia with now