If you mean 84 squared then it is 84*84 = 7056
If you mean the square root of 84 then it is 2 times the square root of 21 which is an irrational number
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84 square meters = 904.17 square feet.
About 7.8 square meters.
84 square feet
Perimeter of which geometry (square, circle, rectangle, triangle, ...)
To find the total area of the floor, you would multiply the length by the width. In this case, 8.4m x 10m = 84 square meters. Therefore, you would need 84 square meters to cover a floor that measures 8.4m by 10m.