How do you use a unit multiplier?

Unit multipliers are fractions that equal 1. When we confer to units it means units of measure such as feet, inches, millimeters, centimeters.

1 liter (L) = 1000 milliliters (mL) [liquid]

and 0.001 L = 1 mL

1 cubic centimeter (cc) = 1 mL [liquid]

10 millimeters (mm) = 1 centimeter (cm)

and 0.1mm = 0.01cm

0.1mm = 0.0001 meter (m)

and 1000 mm = 1 m

100 cm = 1 m

and 0.01 m = 1 cm

1000 m = 1 kilometer (km)

and 0.001km = 1m

1000 gram (g) = 1 kilogram (kg) [mass]

They are basectly fractions with units of measures