Metric prefixes

Symbol	Name	Meaning
G	giga	109
M	mega	106
k	kilo	103
c	centi	10-2
m	mili	10-3
µ	micro	10-6
n	nano	10-9
p	pico	10-12
f	femto	10-15
a	atto	10-18
z	zepto	10-21