Помогите 1) 7 * 4/37 2) 7/15 * 3 3) 8/15 * 26 4) 3 3/8 * 7/9

Решите задачу:

$7* \frac{4}{37}= \frac{7}{1}* \frac{4}{37} = \frac{28}{37}$

$\frac{7}{15}*3= \frac{7}{15}* \frac{3}{1}= \frac{7}{5}* \frac{1}{1}= \frac{7}{5}=1 \frac{2}{5}$

$\frac{8}{15}*26= \frac{8}{15}* \frac{26}{1}= \frac{208}{15}=13 \frac{13}{15}$

$3 \frac{3}{8} * \frac{7}{9}= \frac{27}{8}* \frac{7}{9}= \frac{3}{8}* \frac{7}{1}= \frac{21}{8}=2 \frac{5}{8}$