$${\mathtt{r}} = {\sqrt{{\frac{{\mathtt{625}}}{{\mathtt{\pi}}}}}} \Rightarrow {\mathtt{r}} = {\mathtt{14.104\: \!739\: \!588\: \!693\: \!906}}$$
$${\mathtt{r}} = {\sqrt{{\frac{{\mathtt{625}}}{{\mathtt{\pi}}}}}} \Rightarrow {\mathtt{r}} = {\mathtt{14.104\: \!739\: \!588\: \!693\: \!906}}$$