local r = io.read("*n")
local R = io.read("*n")
local function circle(radius)
  return math.pi * radius * radius
end
local ret = circle(R + r) - circle(R - r)
local t = (2 * math.pi - 2 * math.asin(r / R))
print(string.format("%.10f", t))
ret = ret * t / (2 * math.pi) + circle(r)
print(string.format("%.10f", ret))