UnitPrefixToMultiplier('fs')
 ans = 
     1e-15;
 
 UnitPrefixToMultiplier('\mum')
 ans = 
     1e-6;
 
 UnitPrefixToMultiplier('um')
 ans = 
     1e-6;
 
  	symbol	short scale	long scale
  yotta	Y	 10008	   10^24	1000000000000000000000000	 septillion	 quadrillion	1991
  zetta	Z	 10007	   10^21	1000000000000000000000	 sextillion	 thousand trillion	1991
  exa	E	 10006	   10^18	1000000000000000000	 quintillion	 trillion	1975
  peta	P	 10005	   10^15	1000000000000000	 quadrillion	 thousand billion	1975
  tera	T	 10004	   10^12	1000000000000	 trillion	 billion	1960
  giga	G	 10003	   10^9	1000000000	 billion	 thousand million	1960
  mega	M	 10002	   10^6	1000000	            million	1960
  kilo	k	 10001	   10^3	1000	            thousand	1795
  hecto	h	 10002/3   10^2	100	            hundred	1795
  deca	da	 10001/3   10^1	10	            ten	1795
             10000	   10^0	1	            one	–
  deci	d	 1000−1/3  10−1	0.1	            tenth	1795
  centi	c	 1000−2/3  10−2	0.01	            hundredth	1795
  milli	m	 1000−1	   10−3	0.001	            thousandth	1795
  micro	μ	 1000−2	   10−6	0.000001	            millionth	1960
  nano	n	 1000−3	   10−9	0.000000001	 billionth	 thousand millionth	1960
  pico	p	 1000−4	   10−12	0.000000000001	 trillionth	 billionth	1960
  femto	f	 1000−5	   10−15	0.000000000000001	 quadrillionth	 thousand billionth	1964
  atto	a	 1000−6	   10−18	0.000000000000000001	 quintillionth	 trillionth	1964
  zepto	z	 1000−7	   10−21	0.000000000000000000001	 sextillionth	 thousand trillionth	1991
  yocto	y	 1000−8	   10−24 	0.000000000000000000000001	 septillionth	 quadrillionth 	1991