1/13 x 1/13 x 1/13

$$\left({\frac{{\mathtt{1}}}{{\mathtt{13}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{13}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{13}}}}\right) = {\frac{{\mathtt{1}}}{{\mathtt{2\,197}}}} = {\mathtt{0.000\: \!455\: \!166\: \!135\: \!639\: \!5}}$$

.