15/4 * 6/5

To multiply the fractions \( \frac{15}{4} \) and \( \frac{6}{5} \), you multiply the numerators together and the denominators together.

\[ \frac{15}{4} \times \frac{6}{5} = \frac{15 \times 6}{4 \times 5} \]

Calculating the numerator and denominator:

\[ 15 \times 6 = 90 \] \[ 4 \times 5 = 20 \]

So, we have:

\[ \frac{90}{20} \]

Now, simplify the fraction:

\[ \frac{90 \div 10}{20 \div 10} = \frac{9}{2} \]

Thus, the result is:

\[ \frac{9}{2} \text{ or } 4.5 \]