You find an old book and decide to estimate the thickness of one of the sheets or leafs. Neglecting the front and back cover, if all the sheets of book are 3 inches thick, and has 1024 marked pages (numbered 1 to 1024), what is the approximate thickness of the sheet in units of mm. Note: do not include mm in your answer. Enter only your numerical value, else your answer will be counted wrong. Hint: Each sheet or leaf of paper has 2 pages (think about any textbook or magazine)