URI Online Judge | 2584
# Pentagon

**Timelimit: 1**

By Ricardo Martins, IFSULDEMINAS Brazil

It is possible to calculate the area of a regular pentagon, that is, a geometric figure with five equal sides, given the length of one side. So, do it.

Write a program that, given the length of one side of a regular pentagon, computes your area.

There will be a value **C** that indicates the number of test cases. Then there will be an integer **N** for each case (1 ≤ **N** ≤ 10000), indicating the length of the side of a regular pentagon.

For each test case, print the corresponding value of the area of the respective pentagon, with three decimal digits of precision.

Input Sample | Output Sample |

3 |
1.720 |