You and your friend are in different towns and want to meet somewhere in between.

The two of you are ~N~ km apart and your car is ~X~ kilometers per hour faster than your friend's car.

If it takes you ~T~ hours to reach each other, how fast is your car?

Input Specification

The first line will contain one integer, ~N~ ~(0 \le N \le 10^9)~, the distance between the two towns.

The second line will contain one integers, ~X~ ~(0 \le X \le 10^9)~, how much faster your car is than your friend's car in km/h.

The third line will contain one integer, ~T~ ~(1 \le T \le 10^9)~, the time it takes for you to meet each other.

Output Specification

On the first line, output the speed of your (faster) car in km/h. Your answer will be considered correct if it has an absolute or relative error of at most ~10^{-6}~.

Sample Input 1

200
20
2

Sample Output 1

60

Sample Input 2

1000
7
3

Sample Output 2

170.16666666666666