func main()
	var t: int :: cui@inputInt()
	for(1, t)
		var p: float :: cui@inputFloat()
		var k: int :: cui@inputInt()
		var ans: float :: 0.0
		var pn: float :: 1.0
		for i(1, k)
			if(i = k)
				do ans :+ i $ float * pn
			else
				do ans :+ i $ float * pn * p
				do pn :* (1.0 - p)
			end if
		end for
		do cui@print("\{ans}\n")
	end for
end func