<reponame>omar115/code_for_Kids<filename>problem solving/1002.py<gh_stars>0


r = float(input())
result = 3.14159 * r * r
print("A={:.4f}".format(result))
solving/1002.py<gh_stars>0


r = float(input())
result = 3.14159 * r * r
print("A={:.4f}".format(result))