Simon got a new drill recently. Everyone knows that a drill is shaped like a right circular cone. Simon knows his drill has radius and height
. But now he wants to calculate the volume. Write a program to help Simon!
Input Specification
The first line of input will have an integer
.
The second line of input will have an integer
.
Output Specification
The first line of output should have the volume of Simon's drill. The output will be accepted if it's within an absolute or relative error of .
Sample Input
3
5
Sample Output
47.12
Hint
is the volume of the right circular cone with radius
and height
.
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