I stole it from Wikipedia, which has more details: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;FLOPS#Cost_of_computing" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;FLOPS#Cost_of_computing</a>