Thanks Cphill
Thank you all!!
Thank You!!
Yes and they are all inside the Radical sign
Thanks all of You!!
Thank You All!!
Thanks Hectitar but I think the correct answer is
686 x 25/6
I checked it with Wolfram Alpha
(http://www.wolframalpha.com/input/?i=%5E3%E2%88%9A16+x+7%5E3%E2%88%9A2)
Plus I checked it with another calculator and the answer was: 686 x 25/6
Thank You