That means the rock has a downward force due to gravity of
(9.8)(36,000)
= 352,800 N downwards on a free body diagram. If the rock is balanced,
that means the normal force up is equal to 352,800 N. And due to
Newton's about equal and opposite reactions, if the pedestal is pushing
up on the rock with 352,800 N of force, then the rock is exerting
352,800 N of force onto the pedestal.
