60. Найдите произведение: 1) $$7 \cdot \frac{4}{37}$$; 2) $$\frac{7}{3} \cdot 26$$; 3) $$\frac{8}{13} \cdot 26$$; 4) $$3 \frac{3}{7} \cdot \frac{7}{9}$$; 5) $$4 \frac{4}{7} \cdot 2 \frac{11}{12}$$; 6) $$1 \frac{2}{15} \cdot 1 \frac{5}{13} \cdot 1 \frac{1}{8}$$

1) $$7 \cdot \frac{4}{37} = \frac{7 \cdot 4}{37} = \frac{28}{37}$$ 2) $$\frac{7}{3} \cdot 26 = \frac{7 \cdot 26}{3} = \frac{182}{3} = 60 \frac{2}{3}$$ 3) $$\frac{8}{13} \cdot 26 = \frac{8 \cdot 26}{13} = \frac{8 \cdot 2 \cdot 13}{13} = 8 \cdot 2 = 16$$ 4) $$3 \frac{3}{7} \cdot \frac{7}{9} = \frac{24}{7} \cdot \frac{7}{9} = \frac{24 \cdot 7}{7 \cdot 9} = \frac{24}{9} = \frac{8 \cdot 3}{3 \cdot 3} = \frac{8}{3} = 2 \frac{2}{3}$$ 5) $$4 \frac{4}{7} \cdot 2 \frac{11}{12} = \frac{32}{7} \cdot \frac{35}{12} = \frac{32 \cdot 35}{7 \cdot 12} = \frac{8 \cdot 4 \cdot 5 \cdot 7}{7 \cdot 3 \cdot 4} = \frac{8 \cdot 5}{3} = \frac{40}{3} = 13 \frac{1}{3}$$ 6) $$1 \frac{2}{15} \cdot 1 \frac{5}{13} \cdot 1 \frac{1}{8} = \frac{17}{15} \cdot \frac{18}{13} \cdot \frac{9}{8} = \frac{17 \cdot 18 \cdot 9}{15 \cdot 13 \cdot 8} = \frac{17 \cdot 2 \cdot 9 \cdot 9}{5 \cdot 3 \cdot 13 \cdot 8} = \frac{17 \cdot 9 \cdot 3}{5 \cdot 13 \cdot 4} = \frac{459}{260} = 1 \frac{199}{260}$$