Помогите прошу!Умоляю я не могу....надеюсь вы поможите номер 590

Решите задачу:

$1) 2 \frac{1}{10} * 2 \frac{1}{7} = \frac{21}{10} * \frac{15}{7} = \frac{3}{2} * \frac{3}{1} = \frac{9}{2} =4 \frac{1}{2}$
$2) 4 \frac{1}{6} * 1 \frac{2}{5} = \frac{25}{6} * \frac{7}{5} = \frac{5}{6} * \frac{7}{1} = \frac{35}{6} = 5 \frac{5}{6}$
$3) 1 \frac{1}{7}*2 \frac{6}{11} = \frac{8}{7}* \frac{28}{11}= \frac{8}{1} * \frac{4}{11} = \frac{32 }{11} = 2 \frac{10}{11}$
$4) 1 \frac{1}{5}*2 \frac{11}{12} = \frac{6}{5} * \frac{35}{12} = \frac{1}{1} * \frac{7}{2} = \frac{7}{2} = 3 \frac{1}{2}$
$5) 7 \frac{1}{2} * 7 \frac{1}{15} = \frac{15}{2} * \frac{106}{15} = \frac{1}{1} * \frac{53}{1} = \frac{53}{1} = 53$
$6) 7 \frac{5}{9} * 1 \frac{1}{17} = \frac{68}{9} * \frac{18}{17} = \frac{4}{1} * \frac{2}{1} = \frac{8}{1} = 8$