what is 4/9 x 5/7 x 1/2 =

$$\left({\frac{{\mathtt{4}}}{{\mathtt{9}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{5}}}{{\mathtt{7}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{2}}}}\right) = {\frac{\left({\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{1}}\right)}{\left({\mathtt{9}}{\mathtt{\,\times\,}}{\mathtt{7}}{\mathtt{\,\times\,}}{\mathtt{2}}\right)}} = {\frac{{\mathtt{20}}}{{\mathtt{126}}}} = {\frac{{\mathtt{10}}}{{\mathtt{63}}}}$$

You can also check it on your calculator.

Is there a way to write fractions without using brackets?