**Description**
When placing a board with a pinhole in the middle between an object and a screen, the reversed image of the object will appear on the screen. That is the so-called pinhole imaging.
Assume that we have a candle and a screen. We know the distance A between the pinhole and the candle. We also know the distance B between the pinhole and the screen. We want to know the height of the fire displayed on the screen when we know the height H of the real fire. You could assume that the pinhole is very tiny and the screen is large enough.
**Input**
The input consists of multiple test cases. The first line of input contains an integer T, which is the number of test cases. Each test case is on a separated line, and it consists three integers: A, B, H), separated by ONE whitespace.
[Technical Specification] T is an integer, and T <= 10. A, B, H are integers, and 1 <= A, B, H <= 1000,000.
**Output**
For each test case, print a single line contains the height of the fire displayed on the screen, rounded to two fractional digits.
**Sample Input**
2 1 1 1 2 1 2
**Sample Output**
1.00
1.00 |