60. Найдите произведение: 1) \(4 \cdot \frac{4}{21}\) 3) \(5 \cdot \frac{5}{14}\) 5) \(2\frac{2}{15} \cdot \frac{9}{16}\) 2) \(6 \cdot \frac{7}{18}\) 4) \(5 \cdot \frac{3}{7}\) 6) \(1\frac{7}{8} \cdot 1\frac{1}{15} \cdot 1\frac{7}{16}\)

1) \(4 \cdot \frac{4}{21} = \frac{4 \cdot 4}{21} = \frac{16}{21}\) 2) \(6 \cdot \frac{7}{18} = \frac{6 \cdot 7}{18} = \frac{42}{18} = \frac{7}{3} = 2\frac{1}{3}\) 3) \(5 \cdot \frac{5}{14} = \frac{5 \cdot 5}{14} = \frac{25}{14} = 1\frac{11}{14}\) 4) \(5 \cdot \frac{3}{7} = \frac{5 \cdot 3}{7} = \frac{15}{7} = 2\frac{1}{7}\) 5) \(2\frac{2}{15} \cdot \frac{9}{16} = \frac{32}{15} \cdot \frac{9}{16} = \frac{32 \cdot 9}{15 \cdot 16} = \frac{288}{240} = \frac{6}{5} = 1\frac{1}{5}\) 6) \(1\frac{7}{8} \cdot 1\frac{1}{15} \cdot 1\frac{7}{16} = \frac{15}{8} \cdot \frac{16}{15} \cdot \frac{23}{16} = \frac{15 \cdot 16 \cdot 23}{8 \cdot 15 \cdot 16} = \frac{23}{8} = 2\frac{7}{8}\)