To find the product of \( \frac{3}{5} \) and \( 3\pi \), you multiply the two together:
\[ \frac{3}{5} \times 3\pi = \frac{3 \times 3\pi}{5} = \frac{9\pi}{5} \]
The result, \( \frac{9\pi}{5} \), is a quantity that can represent a length, area, or volume depending on the context in which it is used. In mathematical terms, it combines a rational number with \( \pi \), which is an irrational number. So, the product is a length (or an area or volume) expressed in terms of \( \pi \).