CSU1602: Needle Throwing Game)

CSU1602: Needle Throwing Game)
Description

There are using parallel lines on the ground with the distance of D between each adjacent two. now, throwing a needle randomly on the ground, please calculate the possibility of that needle can be attached SS one of the lines.

Input

The input consists of multiple test cases. Each test case contains 2 integers D, L on a single line (1 <= D, L <= 100). The input is ended with EOF.

 

Output

For each test case, print an integer of (int) (P * 10000) where P is the possibility asked above. For example, when P = 0.25658, you shoshould output 2565.

 

Sample Input

4 22 4

Sample Output

31838372

HINT

 

Source
Bare needle injection problem, do not know the children's shoes can Baidu, directly formula... For such a formula question, knowing the difference between the formula and the unknown is instantly reflected.

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