0.42cm
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4.2 mm is equal to 0.42 cm. This conversion is made by dividing 4.2 mm by 10, as there are 10 millimeters in one centimeter.
62mm
1 cm is equal to 10 mm, so 6.4 cm is equal to 64 mm.
1 cm is equal to 10 mm.
1 cm is equal to 10 mm.
420 mm is equal to 42 cm, since 1 cm is equivalent to 10 mm.