Is there a way to round values to nearest multiple in expressions?

I’m guessing the answer is no, but is there a way I can get expressions to round a value to the nearest multiple of 25 (or at least to the nearest integer so I can divide by 25, round, then multiply by 25 again), using just the provided operations?
If not, should there be?
Dividing a number then multiplying it back doesn’t do that because it keeps the decimals until it gives out the final bearing

I’m making a font where I’d like to have all advance widths be multiples of 25 for spacing reasons but I’d still like subscript glyphs to have their metrics determined with expressions

We will add a round() function with the next upcoming release.

We have just released an update which supports the round() function in the metrics expressions.