Given that: Amount of carbon-14 (14C) was approximately 1/64 of the current atmospheric 14C levels.
Thus, number of half-life the wood sample has crossed = 6, because 2^6=64
Now, Half life of 14C = 5,750 years
Therefore, 6 Half-lifes of 14C = 6 X 5750 = 34500 years
Thus, tree was chopped down around 34500 years before, to be used for the firewood.
