Valuation Trivia

Hey guys, Today at work I was presented with this trivia - There is a company A which has a: ROE of 22% Dividend Payout ration of 100% (semi) - monopoly position - so very stable revenues outlook for the next decades Profit margin remains constant at 20% Foreseeable EPS growth = 0% How many times earnings are you willing to pay for it? So how many times PE would you value this company? I was surprised when I heard the answer - I will post the answer tmrw of so.