You can insert a unit prefix in front of a unit to indicate a power of ten.
The following tables gives the available prefixes:
| Prefix | Name | (*10^) n | Prefix | Name | (*10^) n |
| Y | yota | 24 | d | deci | -1 |
| Z | zeta | 21 | c | cent | -2 |
| E | exa | 18 | m | mili | -3 |
| P | peta | 15 | mu | micro | -6 |
| T | tera | 12 | n | nano | -9 |
| G | giga | 9 | p | pico | -12 |
| M | mega | 6 | f | femto | -15 |
| k or K | kilo | 3 | a | atto | -18 |
| h or H | hecto | 2 | z | zepto | -21 |
| D | deca | 1 | y | yocto | -24 |
Remark
You cannot use a prefix with a built-in unit if the result gives another
built-in unit.
For example,
1_a is one are, but 1_Pa is one pascal and not
10^15_a.