#1*cm# #=# #1xx10^-2*m#
Thus #120*cm=120xx1xx10^-2*m# #=# #1.20*m#.
#"Centi"#, #"micro"#, #"milli"#, and #"kilo"# are simply commonly used mulitpliers to save on the number of #0000"'s"# we have to write.
#"Micro " (mu)# means #xx10^-6#.
#"Milli (m)"# means #xx10^-3#.
#"Kilo (k)"# means #xx10^3#.
#"Mega (m)"# means #xx10^6#.
#"Deci"# means #xx10^-1#.