(1500 USD -> HKD) / 3

[whitequark]

I expect the subject line to work. Is there any reason it can't?

[tiffany352]

I'll have to refactor some internals to make that work, but for now you can write constants in the right-hand side of conversions, e.g.

> 1500 USD -> 3 HKD
8676400/2237, approx. 3878.587 * 3 HKD (money)

[whitequark]

Ah I see--the example in the subject line is minimized, so that wouldn't help me terribly much. But I can wait.

[tiffany352]

The implementation of this is proving to be more complicated than I anticipated, as it requires tagging numbers with the originally specified units. I have a WIP implementation locally that I've been working on for a couple hours.

Your original case is working:

> (1500 USD -> HKD) / 3
approx. 3879.084 HKD (money)

But there are problems:

> mm
1000 m (length)
> mm^3
1.0e-27 m^3 (volume)
> pi -> hex
approx. 3.243f6a π (dimensionless)