1 micro meter = \(10^{-6} meters\)
1 μm ^2 = 1 μm1μm = \(10^{-6} *10^{-6} = 10^{-12}\) meters
1.5 μm^2 = 1.5 \(10^{-12}\) meters
μm^2 is a unit for surface. First you want to convert μm to meters which is unit for length and if you multiply units for length you get unit for surface.
