Jelaskan Basis dari Sistem Hijian Internasional dalam bahasa sunda

SI is built on seven SI base units, the kilogram, metre, second, ampere, kelvin, mole, and candela. These are used to define various SI derived units.

SI also defines a number of SI prefixes to be used with the units: these combine with any unit name to give subdivisions and multiples. For example, the prefix kilo denotes a multiple of a thousand, so the kilometre is 1 000 metres, the kilogram 1 000 grams, and so on. Note that a millionth of a kilogram is a milligram, not a microkilogram.