Asciimath:

    ["xx"]    = "\\times ",

Calcmath:

                        elseif how == '*' then

                            texprint("\\times")

These are the relevant parts from the asciimath and calcmath sources,

to get the output “3 \times 3 = 9” in TeX you have to type with

asciimath “3 xx 3 = 9” and with calcmath “3 * 3 = 9”.

Wolfgang