To solve this question we have to make deduct these 2 years. 2116 minus 1978 will give the answer.
You are 138 years old.
(1656 months are passed.)
From 1978 to 2116 there are 138 years. If you want to learn your age in 2116 (born in 1978) your age is 138.
Let's see what will be your age if you born +1 or -1 from that date.