Pensions - The Average Life Expectancy

i started by looking, i found a guy on line who was running a webenar. And he ran this web and o and the first thing he said was, the average life expectancy for a man is 75 years old. So if we, if we retire at 65, we need enough money to live until we're a 75, right? But then i looked up the average pension pot in the u.K. Ind the average u. K. Pension pots around it was around 85, 86, 87 grand,. something like that at the time. And anyway, i worked out that it was about, you'd have to live on about seven grand, seven to eight grand per year