13/22 x 15/30 divided by square root of 20

$${\frac{\left(\left({\frac{{\mathtt{13}}}{{\mathtt{22}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{2}}}}\right)\right)}{{\sqrt{{\mathtt{20}}}}}} = {\mathtt{0.066\: \!065\: \!644\: \!789\: \!766\: \!5}}$$