$$\left({\frac{{\mathtt{3}}}{{\mathtt{7}}}}\right){\mathtt{\,\times\,}}{\mathtt{x}} = {\mathtt{522}}$$ => $${\mathtt{x}} = {\frac{{\mathtt{522}}{\mathtt{\,\times\,}}{\mathtt{7}}}{{\mathtt{3}}}}$$ => x = $${\frac{{\mathtt{522}}{\mathtt{\,\times\,}}{\mathtt{7}}}{{\mathtt{3}}}} = {\mathtt{1\,218}}$$
$$\left({\frac{{\mathtt{3}}}{{\mathtt{7}}}}\right){\mathtt{\,\times\,}}{\mathtt{x}} = {\mathtt{522}}$$ => $${\mathtt{x}} = {\frac{{\mathtt{522}}{\mathtt{\,\times\,}}{\mathtt{7}}}{{\mathtt{3}}}}$$ => x = $${\frac{{\mathtt{522}}{\mathtt{\,\times\,}}{\mathtt{7}}}{{\mathtt{3}}}} = {\mathtt{1\,218}}$$