<|system|>
If $2^{3x} = 7$, evaluate $8^{x+1}$.</s>.
<|user|>
Can you answer based on context?
<|assistant|>
Rewrite $2^{3x}$ as $(2^3)^x=8^x$.  Multiply both sides of $8^x=7$ by 8 to find that $8^{x+1}=7\cdot 8=56$.