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Grams is no good - it is a measure of weight not length. Kilometers measure length - but only if your table-top is a few miles long. Most appropriate would be Meters - your average dining table is about one-and-a-half meters long.
If the table is a circle and the perimeter is 40 feet, then the diameter (rounded to 2 decimal places) would be 12.74 circumference = diameter x pi so, diameter = circumference / pi
Unfortunately not, 1.6 metres is 160 centimetres, so the tablecloth is 5cm short.
Assuming these measurements refer to the top of a rectangular table, the surface area of the tabletop is equal to 130 x 88 = 11440 square inches.