http://en.wikipedia.org/wiki/SI_prefix
 
An SI prefix (also known as a metric prefix) is a name or associated
symbol that precedes a basic unit of measure (or its symbol) to form a
decimal multiple or submultiple.

Data
		atto = 1.0000000000000001e-18 centi = 0.01 deca = 10.0 deci = 0.10000000000000001 exa = 1e+18 femto = 1.0000000000000001e-15 giga = 1000000000.0 hecto = 100.0 kilo = 1000.0 mega = 1000000.0 micro = 9.9999999999999995e-07 milli = 0.001 nano = 1.0000000000000001e-09 peta = 1000000000000000.0 pico = 9.9999999999999998e-13 tera = 1000000000000.0 yocto = 9.9999999999999992e-25 yotta = 9.9999999999999998e+23 zepto = 9.9999999999999991e-22 zetta = 1e+21