0.3ab при $$a = \frac{2}{3}$$, $$b=1.5$$.

$$0.3ab = 0.3 \cdot \frac{2}{3} \cdot 1.5 = 0.3 \cdot \frac{2}{3} \cdot \frac{3}{2} = 0.3 \cdot 1 = 0.3$$

Ответ: 0.3