If 80% of 50% of $\frac{3}{8}$ of a number is 537, find the number.

Let the number be $x$.

According to the question:

$80%$ of $50%$ of $\frac{3}{8}$ of $x = 537$

So,

$\frac{80}{100} \times \frac{50}{100} \times \frac{3}{8} \times x = 537$

$\frac{4}{5} \times \frac{1}{2} \times \frac{3}{8} \times x = 537$

$\frac{3}{20}x = 537$

$x = 537 \times \frac{20}{3}$

$x = 179 \times 20 = 3580$

Correct Answer: 3580