My mother is going to buy a square tablecloth for the round table. The diameter of the round table is 1.4 meters. If the four corners of the square tablecloth are just under the table Drop 40 cm, mother needs to buy how large a square tablecloth?

The diagonal length of the square tablecloth is 1.4m + 0.4m * 2 = 2.2m
The tablecloth area is 2.2 * 2.2 / 2 = 2.42 square meters

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