scientific notation with no coefficient

[imyxh]

Thanks for the lovely package! The only snag I've run into so far is with siunits you can do e.g. \SI{E15}{atoms} ("10¹⁵ atoms") but if I try to put either E15 or 10^15 as a number in typst-fancy-units it's not recognized as a valid number format. Obviously one can do 1E15 but then there is a "1×" in front.