Ewan k0! hndi ko nga alm eh!
L, mL, dL, g, kg, dg, cg
The prefix of a billion - in the sense of a thousand millions - is "Gega", abbreviated "G".
SI is an international standard system of units. Most people would call it the metric system. SI has standards for the kilogram and meter that can be referenced, to make and calibrate measuring...
Length and width etc. are measured in meters.