Yup, you read the title right. If you're rusty with your math calculations just pull this puppy out! With the sun shining over your head you'll be ready to tackle any math problem, tip calculation, or sales tax question.It may not be necessary but it sure is cool!
Hit the link for an article on this nifty device.
(Source: SlipperyBrick)
The bottom line is...
Solar power proves to be helpful once again.
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