$\frac{ 3 }{ 5 }{x}^{2}y{z}^{3} \times \left( \frac{ 1 }{ 2 }x{y}^{2}z \right)$
Remove unnecessary parentheses$\frac{ 3 }{ 5 }{x}^{2}y{z}^{3} \times \frac{ 1 }{ 2 }x{y}^{2}z$
Calculate the product$\begin{align*}&\frac{ 3 }{ 10 }{x}^{3}{y}^{3}{z}^{4} \\&0.3{x}^{3}{y}^{3}{z}^{4}\end{align*}$