Найдите произведение:

1. $$\frac{6}{11} \cdot \frac{4}{7} = \frac{6 \cdot 4}{11 \cdot 7} = \frac{24}{77}$$

   Ответ: $$\frac{24}{77}$$

2. $$\frac{7}{20} \cdot \frac{10}{21} = \frac{7 \cdot 10}{20 \cdot 21} = \frac{70}{420} = \frac{7}{42} = \frac{1}{6}$$

   Ответ: $$\frac{1}{6}$$

3. $$\frac{8}{9} \cdot \frac{27}{32} = \frac{8 \cdot 27}{9 \cdot 32} = \frac{216}{288} = \frac{3}{4}$$

   Ответ: $$\frac{3}{4}$$

4. $$\frac{23}{28} \cdot \frac{49}{46} = \frac{23 \cdot 49}{28 \cdot 46} = \frac{1127}{1288} = \frac{7}{8}$$

   Ответ: $$\frac{7}{8}$$

5. $$\frac{34}{86} \cdot \frac{43}{51} = \frac{34 \cdot 43}{86 \cdot 51} = \frac{1462}{4386} = \frac{1}{3}$$

   Ответ: $$\frac{1}{3}$$

6. $$\frac{7}{18} \cdot \frac{90}{77} = \frac{7 \cdot 90}{18 \cdot 77} = \frac{630}{1386} = \frac{5}{11}$$

   Ответ: $$\frac{5}{11}$$