2. Выполним умножение:
- $$\frac{5}{18} \times \frac{4}{15} = \frac{5 \times 4}{18 \times 15} = \frac{1 \times 2}{9 \times 3} = \frac{2}{27}$$
- $$6\frac{3}{4} \times 1\frac{11}{45} = \frac{6 \times 4 + 3}{4} \times \frac{1 \times 45 + 11}{45} = \frac{27}{4} \times \frac{56}{45} = \frac{3 \times 14}{1 \times 5} = \frac{42}{5} = 8\frac{2}{5}$$
- $$\frac{11}{18} \times 36 = \frac{11 \times 36}{18} = \frac{11 \times 2}{1} = 22$$
Ответ: 1) $$\frac{2}{27}$$; 2) $$8\frac{2}{5}$$; 3) 22