To solve this question we have to make deduct these 2 years. 2091 minus 1978 will give the answer.
You are 113 years old.
(1356 months are passed.)
From 1978 to 2091 there are 113 years. If you want to learn your age in 2091 (born in 1978) your age is 113.
Let's see what will be your age if you born +1 or -1 from that date.