t = []
t[0] = gets.to_i
t[1] = gets.to_i
t[2] = gets.to_i
dx = (t[0] * t[1]).quo(t[0] + t[1])
dy = (t[0] * t[2]).quo(t[0] + t[2])
x = dx
y = 0
loop {
	if x == y
		puts x
		break
	end
	if x < y
		x += dx
	else
		y += dy
	end
}