To solve this question we have to make deduct these 2 years. 2090 minus 1978 will give the answer.
You are 112 years old.
(1344 months are passed.)
From 1978 to 2090 there are 112 years. If you want to learn your age in 2090 (born in 1978) your age is 112.
Let's see what will be your age if you born +1 or -1 from that date.