7p^4/10q^3•5q/14p^2 :3p/4q^4 Help

[latex] \frac{7p^4}{10q^3} * \frac{5q}{14p^2} : \frac{3p}{4q^4} = = \frac{7p^4* 5q*4q^4}{10q^3*14p^2*3p}= \frac{140*p^4q}{140*3 *p^3q^3 } = \frac{p}{3q^2} [/latex]