Simple, just take a year like 1972 and multiply by 10 to get the government's price in today's dollars. For real life inflation multiply by a minimum of 20. Those who prefer to go by the gold standard should multiply by 28 to 30+.
Thus, 36 cents in 1972 dollars is $3.60 by the government's faked numbers, conservatively real inflation would make that $7.20, and the gold bugs would see that 36 cents as $10.80 or more. So, gas at $3.39 is roughly 16 to 17 cents in 1972 dollars, i.e. half the price it was in 1972 in today's dollars.
This is they CPI index avoids including food and energy in their inflation calculations as well as other goods they misrepresent; they know the public is mostly stupid and will buy their numbers. Japanese and Euro banks don't use our Fed's numbers in their planning, they calculate their own.
Thank you.. You helped me. Stay with it and keep explaining to the Yahoos. You are needed here.