Выполни умножение: 1) 9 3/5 * 10/21

Конечно, давай выполним умножение дробей! 1) $9\frac{3}{5} \cdot \frac{10}{21} = \frac{48}{5} \cdot \frac{10}{21} = \frac{48 \cdot 10}{5 \cdot 21} = \frac{48 \cdot 2}{1 \cdot 21} = \frac{96}{21} = \frac{32}{7} = 4\frac{4}{7}$ 2) $3\frac{11}{12} \cdot \frac{9}{94} = \frac{47}{12} \cdot \frac{9}{94} = \frac{47 \cdot 9}{12 \cdot 94} = \frac{1 \cdot 3}{4 \cdot 2} = \frac{3}{8}$ 3) $1\frac{5}{7} \cdot 6\frac{1}{8} = \frac{12}{7} \cdot \frac{49}{8} = \frac{12 \cdot 49}{7 \cdot 8} = \frac{3 \cdot 7}{1 \cdot 2} = \frac{21}{2} = 10\frac{1}{2}$ 4) $3\frac{5}{9} \cdot 5\frac{1}{4} = \frac{32}{9} \cdot \frac{21}{4} = \frac{32 \cdot 21}{9 \cdot 4} = \frac{8 \cdot 7}{3 \cdot 1} = \frac{56}{3} = 18\frac{2}{3}$ 5) $1\frac{13}{15} \cdot \frac{5}{8} \cdot 2\frac{2}{7} = \frac{28}{15} \cdot \frac{5}{8} \cdot \frac{16}{7} = \frac{28 \cdot 5 \cdot 16}{15 \cdot 8 \cdot 7} = \frac{4 \cdot 1 \cdot 2}{3 \cdot 1 \cdot 1} = \frac{8}{3} = 2\frac{2}{3}$ 6) $2\frac{1}{4} \cdot \frac{16}{27} \cdot 4\frac{1}{3} = \frac{9}{4} \cdot \frac{16}{27} \cdot \frac{13}{3} = \frac{9 \cdot 16 \cdot 13}{4 \cdot 27 \cdot 3} = \frac{1 \cdot 4 \cdot 13}{1 \cdot 3 \cdot 3} = \frac{52}{9} = 5\frac{7}{9}$