a) \(\dfrac{3}{5}\times\dfrac{6}{7}=\dfrac{18}{35}\)
b) \(\dfrac{2}{9}\times\dfrac{18}{3}=\dfrac{4}{3}\)
c) \(\dfrac{5}{7}\times12=\dfrac{60}{7}\)
d) \(21\times\dfrac{2}{7}=6\)
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