Answer
Prefix multipliers are used to change the value of a unit by powers of 10.
For example, $1 milliliter = 1 mL = 10^{-3} Liters$
Work Step by Step
Along with the base units, prefix multipliers are used in SI system of units. Prefix multipliers change the unit value by powers of 10. Prefix multipliers are used to express a large number of measurements in the units that are similar in size to that quantity which we are measuring.
For example:
$1 kilogram = 1 kg = 10^{3} grams$
$1 megabyte = 1 MB = 10^{6} bytes$
$1 millimeter = 1 mm = 10^{-3} meters$
