$$3^2*sqrt(5)$$
$${{\mathtt{3}}}^{{\mathtt{2}}}{\mathtt{\,\times\,}}{\sqrt{{\mathtt{5}}}} = {\mathtt{20.124\: \!611\: \!797\: \!498\: \!107\: \!3}}$$
$${{\mathtt{3}}}^{{\mathtt{2}}} = {\mathtt{9}}$$
$${\sqrt{{\mathtt{5}}}} = {\mathtt{2.236\: \!067\: \!977\: \!499\: \!789\: \!7}}$$
rounded
$${\mathtt{9}}{\mathtt{\,\times\,}}{\mathtt{2.236\: \!067\: \!977\: \!5}} = {\mathtt{20.124\: \!611\: \!797\: \!5}}$$
.