One day Mama came to see Arshiya. Mama knows that Arshiya likes problem solving. So he gave Arshiya an interesting problem. Mama also told Arshiya to think about the problem, and she will find the answer. We all know that how hard-working Arshiya is! She found the answer and now she wants to know that if the problem can be solved by others. So now Mama and Arshiya have arranged a contest and ask you to solve that problem.
You are given a circle with a sector. The radius and the angle of that sector of the circle are also given. You have to find the area of that sector.
Input
The first line of the input will contain an integer $T$ ($0 < T \le 100$), the number of test cases. Then for each test case, there will be two real numbers $R$ ($1 \le R \le 10^2$) and $A$ ($1 \le A \le 360$), the radius of the circle and the angle (in degree) of the sector.
Output
In the output, print the area of the sector.
The answer is considered correct if the absolute or relative error doesn’t exceed $10^{- 4}$.
Sample
| Input | Output |
|---|---|
9 8 56 9 79 5 47 14 102 23 145 10 189 2 210 5 280 4 300 | 31.276300196 55.841809418 10.253809355 174.463112029 669.377401371 164.933614313 7.330382858 61.086523820 41.887902048 |
