how much wood...?

ok, I have searched here and think I am measuring my wood pile(s) and have come up with the right amount of wood I have ready for this winter. I just wanted to see if you all would double check my math. I am comming up with 4 1/2 cord.
I have 3 stacks of seasoned hard wood.

10 feet X 10 feet X 4 feet high = stack one
18 feet X 18 inches wide X 4 feet high = stack two
18 feet X 18 inches wide X 3 feet high = stack three

if you would figure it out with me to see if I am getting this right, I'd appreciate it.

Thanks in advance,
Ray

4.6015625 cords

thanks for helping the slow kid