According to his calculations: 1TByte = 8Tbits

1 punch card =960 possible holes(bits), 12 rows X 80 columns.

8Tbits / 960 = 8,333,333,333 punch cardsA punch card is 7.375" X 3.25" X .007" = 0.1677812 cubic in

1 cubic ft = 1728 cubic in = 10,299 cards

8,333,333,333 cards / 10,299 cards = 809,140 cubic ftand so 809,140 cubic ft x 12 = 9,709,680 cubic ft

(1 cubic mile = 147.2 billion cu ft.)

Glad to be of help.

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