To solve this question we have to make deduct these 2 years. 2112 minus 1977 will give the answer.
You are 135 years old.
(1620 months are passed.)
From 1977 to 2112 there are 135 years. If you want to learn your age in 2112 (born in 1977) your age is 135.
Let's see what will be your age if you born +1 or -1 from that date.