题解 | #圆的面积#
圆的面积
https://www.nowcoder.com/practice/a235f884c28e46c491e7ddc414b54d2b
import math R = float(input()) PI = math.pi print(round(PI*R**2,3))
圆的面积
https://www.nowcoder.com/practice/a235f884c28e46c491e7ddc414b54d2b
import math R = float(input()) PI = math.pi print(round(PI*R**2,3))
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