1 square inch of ink.
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An area of 1 square inch!
144
One square inch is 1/144 of a square foot.1 square inch = 0.006944 square foot (rounded)1 square foot = 144 square inches
1 inch = 2.54 centimeters1 sqare inch = 6.4516 square centimeters
1 square ft= 144 square inch