That is in its simplest form.
The greatest common factor (GCF) is 7m.
The GCF is 7m.
This is a rectangle, not a square, but the problem is solved in the same manner. Multiply length x width. You did not provide units for the 2 and 7, so I'll give you some answers with various units. If the units for length and width are centimeters, A = 2cm x 7cm = 14cm2. If the units for length and width are meters, A = 2m x 7m = 14m2. If the units for length and width are inches, A = 2in x 7in = 14in2. If the units for length and width are feet, A = 2ft x 7ft = 14ft2.