import math
m1 = 0.2
volume1 = m1/7.13
oneSideVolume1 = volume1/2
thickness1 = oneSideVolume1/(3.3*3.2)
layers1 = thickness1/(2.7E-8)
print(layers1)
print(round(layers1,-3))
49190.67565163872
49000.0
m2 = 0.19
volume2 = m2/7.13
oneSideVolume2 = volume2/2
thickness2 = oneSideVolume2/(3.3*3.1)
print(thickness2/(2.7E-8))
print(round(thickness2/(2.7E-8),-3))
48238.59805838119
48000.0
wavelength = 589E-9
2.998E8/wavelength