If $\log_2 (\log_3 (\log_2 x)) = 0$ then $x = ?$

Working outward: $\log_2(\cdots)=0 \Rightarrow \log_3(\log_2 x) = 1 \Rightarrow \log_2 x = 3 \Rightarrow x = 2^3 = 8$.