Ishmael hooked a big fish! The fish dragged his boat $$\(x \mathrm{~km}\)$$ east, then $$\(6 x+3 \mathrm{~km}\)$$ north, then $$\(x+8 \mathrm{~km}\)$$ east, then $$\(2 x-2 \mathrm{~km}\)$$ south, then $$\(2 x+8 \mathrm{~km}\)$$ west, then $$\(x^{2} \mathrm{~km}\)$$ south. Then, the fish escaped. Ishmael looked around to find that he was exactly where he had started. How many km long was the route taken by the fish and Ishmael?

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