what is 3/7 times 5/3 times 7/11 =

Hello! $\frac{3}{7} \cdot \frac{5}{3} \cdot \frac{7}{11} = \frac{3\cdot5\cdot7}{7\cdot3\cdot11} = \frac{105}{231} = \frac{105\div21}{231\div21} = \boxed{\frac{5}{11}}$