How to label equation with a symbol?

Questions
,
1

In some contexts, such as proofs or beamer presentations, equations are sometimes labeled with symbols rather than numbers. One of my attempts is the following:

  #set math.equation(numbering: "(*)",number-align: left)
  $
  f= u product g_i  space.thin  .
  $

The result turns out to be a star in superscript.

Screenshot 2024-10-05 at 21.24.07
Screenshot 2024-10-05 at 21.24.071532×152 17.4 KB

Is there a way to make it normal size?

2

This is actually a normal asterisk, but we can replace it with a centered one.
I used asterisk operator in particular.
If you prefer a different one, you can select one at asterisk | Graphemica Search.

#set math.equation(
  numbering: n => {
    let symbols = ("∗", "†", "‡", "§", "¶", "‖")
    let symbol = symbols.at(calc.rem(n - 1, symbols.len()))
    [(#symbol)]
  },
  number-align: left,
)

$ f = u product g_i space.thin . $
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