$${\frac{{\mathtt{3}}}{{\mathtt{4}}}}$$ * $${\frac{{\mathtt{3}}}{{\mathtt{8}}}}$$ =
This is effectively the same as;
$${\frac{\left({\mathtt{3}}{\mathtt{\,\times\,}}{\mathtt{3}}\right)}{\left({\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{8}}\right)}}$$ =
Hopefully this helps you to answer your own question, if not please ask for more help.
$${\frac{{\mathtt{3}}}{{\mathtt{4}}}}$$ * $${\frac{{\mathtt{3}}}{{\mathtt{8}}}}$$ =
This is effectively the same as;
$${\frac{\left({\mathtt{3}}{\mathtt{\,\times\,}}{\mathtt{3}}\right)}{\left({\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{8}}\right)}}$$ =
Hopefully this helps you to answer your own question, if not please ask for more help.