题目描述
Tracy loves Donuts. She purchased a lots of Donuts for her birthday party. She learnt to calculate the area of the circle a few days back and she is fascinated to know the area of the donuts as well !! Help her finding the area of the Donuts…..
-----Input:-----
- First line will contain, number of testcases. Then the testcases follow.
- Each testcase contains of a single line of input, where in you have to provide the RADIUS of the Donuts.
-----Output:-----
For each testcase, output in a single line answer is the AREA of the Donut.
-----Constraints-----
1 <= Radius <= 20.
-----Sample Input:-----
2
5
12
-----Sample Output:-----
78.5
452.16
输入格式
见题面
输出格式
见题面
样例输入
['2', '5', '12']
样例输出
['78.5', '452.16']