a man wants to buy an engagement ring. he has a choice of 4 metals (gold, silver, platinum, titanium), 3 stones (diamond, emerald, ruby ) and 3 cuts...

a man wants to buy an engagement ring. he has a choice of 4 metals (gold, silver, platinum, titanium), 3 stones (diamond, emerald, ruby ) and 3 cuts of stone (tiffany, square and round ). assuming they must choose one specific type of metal, one type of stone and one cut, how many different ring combinations do they have to choose from?