The problem is to evaluate the expression $[(-3) \times (+8)] \div [(+15) \div (-4)]$.

1. Problem Description

The problem is to evaluate the expression $[(-3) \times (+8)] \div [(+15) \div (-4)]$.

2. Solution Steps

First, we evaluate the expression inside the first set of brackets:

$(-3) \times (+8) = -24$.

Next, we evaluate the expression inside the second set of brackets:

$(+15) \div (-4) = -\frac{15}{4}$.

Finally, we divide the two results:

$(-24) \div (-\frac{15}{4}) = -24 \times (-\frac{4}{15}) = \frac{24 \times 4}{15} = \frac{96}{15}$.

Simplify the fraction:

$\frac{96}{15} = \frac{32 \times 3}{5 \times 3} = \frac{32}{5}$.

As a decimal,

$\frac{32}{5} = 6.4$

3. Final Answer

$\frac{32}{5}$ or $6.4$