9) (0,3)⁷x(0,3)²² (0,3)²¹x(0,3)⁷

$$\frac{(0.3)^7 \times (0.3)^{22}}{(0.3)^{21} \times (0.3)^7} = \frac{(0.3)^{7+22}}{(0.3)^{21+7}} = \frac{(0.3)^{29}}{(0.3)^{28}} = (0.3)^{29-28} = (0.3)^1 = 0.3$$

Ответ: 0.3