Refractometer, not sure how to use?

[Tigerarmy]

Just got a refractometer, no instructions, not sure how to use it. I get a reading of 1.026 on my hydrometer and get 4 on my refractometer. I was told to multiply that number by 4 and that would give me my SG? If that's the case I'd be sitting at 1.016?
Here is a link to a meter that is almost identical to mine.
http://www.sciencefirst.com/vw_prdct..._mdl_cd=78-620