Multiplication
[tex]\frac{3}{4}\times\frac{8}{3}[/tex]you multiply the numbers that are in front
[tex]\begin{gathered} \frac{3\times8}{4\times3} \\ \\ \frac{24}{12} \end{gathered}[/tex]then simplify and the answer is 2
Division
[tex]\frac{\frac{3}{4}}{\frac{8}{3}}[/tex]
you multiply the extremes and the solution is the numerator of the result
then multiply the internals and the solution is the denominator of the result
[tex]\begin{gathered} \frac{3\times3}{4\times8} \\ \\ \frac{9}{32} \end{gathered}[/tex]Other exercise about division
so the solution is
[tex]\frac{12}{2}=6[/tex]