4 rows * 9 columns = 45 cells, (when you can't remember the correct number of rows).
It takes one click to grab an item, and a second click to place it, and 45*2 is 90.
But since the inventory is actually 36 (excluding 4 armour), it's only 72 clicks.
Except you need to do some of it again (probably the 9 hotkey slots), so it is actually 90 afterall.
:@
Plus Minecraft logs stats about what you do. I do not wish to be labelled a serial suicider.
:@EDITED: 11 Jun 2011 22:06 by BOUGHTONP