Python 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:54:40) [MSC v.1900 64 bit (AMD64)] on win32
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>>> r=25
>>> area=3.1415*r*r
>>> print(area)
1963.4375000000002
>>> print("{:.2f}F".format(area))
1963.44F
