1 centimeter is equal to 10 millimeters.
To convert 3 centimeters to millimeters, you can use the conversion factor of 1 centimeter = 10 millimeters.
Step 1: Multiply the number of centimeters by the conversion factor.
3 cm x 10 mm = 30 mm
Therefore, 3 centimeters is equal to 30 millimeters.
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