Gilbert is a diligent boy. Today he and his friend, Hilmy are studying something about geometry. They are learning the formula to calculate the volume of a cylinder. Since both of them are programmer, they decide to create a program.

Use PI = 3.14

Input

Input consist of one line. There are two integers d and t, the diameter and the height of cylinder in cm.

Output

Print the volume of the cylinder with accuracy of 1/100, then followed by a string " cm^3".

Example

Input:
3 10

Output:
70.65 cm^3

Constraint

• 1 <= d, t <= 100