Question

How do you convert 12 cm to meters?

Answer 1

`12*cm` `-=` `12xx10^-2m`, or `0.012*m`

Explanation:

`c` in `cm` stands for `"centi"`, i.e. `xx10^-2`. In the same way `mu` in `mum` stands for `xx10^-6`.

And thus:

`1*mum-=10^-6m`

`1*cm-=10^-2m`

`1*dm-=10^-1m`

`1*km-=10^3m`

And so on!