The power to make a 60kg drone hover?

Dear Engineers,
For a battery powered drone of 60kg total , how much electrical power will be drawn from the battery to hover it?

There is an equation: P = K. m^(1.5)/r (from the following website)
https://justdrones.com.au/how-much-power-is-needed-to-hover/

Where:
P =power
K=22.35
m = mass in kg
r = propeller radius (length) in metres.

However, I am speaking of a drone with 4 motors and each motor drives dual stacked propellors which rotate in opposite directions. (so eight sets of propellers in 4 "pairs")

Then you need to find/derive the equation for a stacked propeller.

The equation you have would likely give a rough guess, which I would at least double for margin.