Divide $4$ by $\frac{1}{\frac{4}{\frac{590}{\frac{0.25}{\frac{1}{\frac{4}{0.4}}}}}}$ by multiplying $4$ by the reciprocal of $\frac{1}{\frac{4}{\frac{590}{\frac{0.25}{\frac{1}{\frac{4}{0.4}}}}}}$.
Divide $4$ by $\frac{590}{\frac{0.25}{\frac{1}{\frac{4}{0.4}}}}$ by multiplying $4$ by the reciprocal of $\frac{590}{\frac{0.25}{\frac{1}{\frac{4}{0.4}}}}$.