>>> from geometry import area_perim_circle

>>> a,p = area_perim_circle(0.3)
>>> round(a,4)
0.2827
>>> round(p,4)
1.885

>>> a,p = area_perim_circle(1.57)
>>> round(a,4)
7.7437
>>> round(p,4)
9.8646

>>> a,p = area_perim_circle(4)
>>> round(a,4)
50.2655
>>> round(p,4)
25.1327

>>> a,p = area_perim_circle(53.523)
>>> round(a,4)
8999.7567
>>> round(p,4)
336.2949