1 nm = 1.0E-7 cm, 21 nm = 2.1E-6 cm, 41 nm = 4.1E-6 cm, 70 nm = 7.0E-6 cm. 2 nm = 2.0E-7 cm, 22 nm = 2.2E-6 cm, 42 nm = 4.2E-6 cm, 80 nm = 8.0E-6 cm. 3 nm
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