evaluate right side first, then remember the result as the value on the left side
in case of fractions always round down


healing items:

1) heal power = (15+level) * (item power + gear bonuses) / 8
	item power:
		Round Drop: 4
		Chocolate: 7
		Honey: 15
		Item Seed: 2
		Mysterious Seed: 2
		Flying Seed: 3
		Magic Seed: 3
		??? Seed: 5
		W/A Seed: 5
		Poto Oil: 5
		Lord's Proof: 7
		Holy Waters Vial: 7
	gear bonus:
		+5 heal weapon
		+2 heal armor
		+3 Protect Earring
		+2 Holy Claw


2) heal power = heal power + item base
	item base:
		Round Drop: 25
		Chocolate: 45
		Honey: 127
		Item Seed: 20
		Mysterious Seed: 22
		Flying Seed: 23
		Magic Seed: 24
		??? Seed: 35
		W/A Seed: 35
		Poto Oil: 30
		Lord's Proof: 45
		Holy Waters Vial: 45


3) heal power = heal power * (169 + level) / 93


4) harm undead instead of healing