func main()
	var ss: [][]char :: cui@input().split(" ")
	var a: int :: ss[0].toInt(&)
	var b: int :: ss[1].toInt(&)
	var c: int :: ss[2].toInt(&)
	var ans: float :: (a * c) $ float / b $ float
	do cui@print("\{ans.toStrFmt(".8f")}\n")
end func