$-15 \times\dfrac{7}{21}$ =

$\dfrac{2}{9}\times\dfrac{6}{13}$ =

$\dfrac{2}{3}\times\dfrac{7}{9}$ =

$\dfrac{8}{7}\times\dfrac{10}{14}$ =

$\dfrac{2}{99}\times 17$ =

$\dfrac{15}{9}\times\dfrac{7}{6}$ =

$\dfrac{19}{3}\times\dfrac{2}{7}$ =

$\dfrac{-17}{2}\times\dfrac{1}{-3}$ =

$2 \times\dfrac{4}{4}$ =

$\dfrac{3}{5}\times\dfrac{9}{10}$ =