Is it possible to reset the numbers which appear after invoking

\placeformula?

To be more precise, I mean the following situation:

\starttext

Euler says

\placeformula

\startformula

{\rm e}^{{\rm i} \pi} + 1 = 0.

\stopformula

The above formula will have number (1). Euler's formula is the same as the

following

\placeformula

\startformula

{\rm e}^{{\rm i} \pi} = - 1.

\stopformula

The above formula will have number (2), but for some reasons I wish to

number it again as (1).

\stoptext

I would like to have a solution which works with ConTeXt mkiv.

Thanks for any advice, and best regards: OK

\resetnumber[formula]
or
\setnumber[formula]{<insert number>}

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