i need help understanding the math behind a falling body.

from what I understand, you fall 16 feet your first second of free fall.

here is the formula I found:

(time (in seconds) x 32) divided by 2

here is where I get confused. The 2nd second, according to the formula, you fall 64 feet.

Now, does the 64 feet represent the total distance fallen, or just the amount fallen in that second? Or to ask another way, did I fall 64 feet total or 80 feet total (16 in second 1 and 64 in second 2)?

can someone help me understand? Thank you in advance