Вычислите: (3*5/6)^2.

\[\left( 3 \cdot \frac{5}{6} \right)^{2} = \left( \frac{3 \cdot 5}{6} \right)^{2} = \frac{5^{2}}{2^{2}} = \frac{25}{4} =\]

\[= 6\frac{1}{4} = 6,25.\]