set {_x} to level of fortune of player's tool
set {_z} to level of efficiency of player's tool
if {_z} < 5:
	if {_z} < 10:
		set {_x} to {_x} * 4
	else:
		set {_x} to {_x} * 2
else:
	set {_x} to {_x} * 1.1