information:highlighting, structural:summarization
Example notations in everyday life

The basic units of the metric system, as originally defined, represented common quantities or relationships in nature. They still do – the modern precisely defined quantities are refinements of definition and methodology, but still with the same magnitudes. In cases where laboratory precision may not be required or available, or where approximations are good enough, the original definitions may suffice.

Basic units: metre, kilogram, second, ampere, kelvin, mole, and candela for derived units, such as Volts and Watts, see International System of Units.