volume of a cone that has 36 diameter and 12 height

Cone:  d=36  =>  r=18    ; h =12

$${\mathtt{V}} = {\frac{{{\mathtt{r}}}^{{\mathtt{2}}}{\mathtt{\,\times\,}}{\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{h}}}{{\mathtt{3}}}}$$       =>    $${\mathtt{V}} = {\frac{{{\mathtt{18}}}^{{\mathtt{2}}}{\mathtt{\,\times\,}}{\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{12}}}{{\mathtt{3}}}} \Rightarrow {\mathtt{V}} = {\mathtt{4\,071.504\: \!079\: \!052\: \!372\: \!037}}$$