Решение:

1) $$9\frac{3}{5} \cdot \frac{10}{21}$$ = $$ \frac{9\cdot5 + 3}{5} \cdot \frac{10}{21}$$ = $$\frac{48}{5} \cdot \frac{10}{21}$$ = $$\frac{48 \cdot 10}{5 \cdot 21}$$ = $$\frac{48 \cdot 2}{1 \cdot 21}$$ = $$\frac{96}{21}$$ = $$\frac{32}{7}$$ = $$4\frac{4}{7}$$

Ответ: $$4\frac{4}{7}$$

2) $$3\frac{11}{12} \cdot \frac{9}{94}$$ = $$\frac{3\cdot12 + 11}{12} \cdot \frac{9}{94}$$ = $$\frac{47}{12} \cdot \frac{9}{94}$$ = $$\frac{47 \cdot 9}{12 \cdot 94}$$ = $$\frac{47 \cdot 3}{4 \cdot 94}$$ = $$\frac{141}{376}$$

Ответ: $$\frac{141}{376}$$