Excepting product function to return 4 digits after decimal

Sandeep said:

product(16746.75 * 1.0125)

this is already incorrect.  you don't put the multiplication inside the product() function; you should be using either the multiplication operator "*" or the product() function on the same numbers.

One thing that's difficult to understand about Appian is that it auto-formats outputs to a user-facing plaintext value no matter what the actual result of the operation is (which is something some of us have a lot of qualms about, but that's another story).  Similar to any displayed result being automatically wrapped in round(X, 2) or similar.  In your case I suspect it's a matter of forcing the output to display the full decimal value, like with the function fixed()...

fixed(
  product(16746.75, 1.0125),
  4
)

44.aaaa

That it shouldn't take. Then I tried changing the regular expression to

/\d*\.\d{1,4}/

44.1aaa

4.1
421.11
467.111
438904.1111
0.1

Sonic exe

1234.a
489.a
435.aaa
412.1a