I hope you're not implying that 140 is a square number, because it isn't one.
The smallest whole-number square that's more than 140 is 144 ... the square of 12.
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no
9 is the square number after 8.
140 square meters is 1,506.95 square feet.
140 square ft = 140 / (3.28084)2 = 13.006 square meter (rounded)
The next perfect square after 81 (92) is 100 (102).