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I suck at this game and I'm not sure how to use the machine.

You just drag two elements to it and it will run a selected math operation (addition, subtraction, multiplication or division) on their atomic numbers (the number on top) and then spits out the result as an element that has the result as atomic number (if found). 

Yeah, I figured it out after I sent my comment.

what machine

It's on the top right.

Ok thanks