Well, you could plug Graham's number into the Bekenstein–Hawking formula[1]. The formula defines the area and there's a factor of the plank length in there, but

Well, you could plug Graham's number into the Bekenstein–Hawking formula[1]. The formula defines the area and there's a factor of the plank length in there, but Graham's number is so overwhelming that the the result is pretty much Graham's number in any units you want. [1] https://en.wikipedia.org/wiki/Black-hole_thermodynamics https://en.wikipedia.org/wiki/Black-hole_thermodynamics