Display attributes of temporary datatypes

By some operations, a temporary datatype is generated:
Language Reference "Operational expressions":
>The operands of an operation in a PL/I expression are converted, if necessary, to the same data type before the operation is performed.

But this (temporary) datatype is not visible on the compilerlisting.
Please let the compiler show that datatype(s) in the Listing.

Example Source:

SKY0281: PROC OPTIONS(MAIN);
/*=-----------------------------------------------------------------=*/
/* INTERNE DATENKONVERSIONEN SICHTBAR MACHEN */
/*=-----------------------------------------------------------------=*/
DCL B_VAR1 BIN FIXED(31);
DCL B_VAR2 DEC FIXED(11,2);
DCL B_VAR3 DEC FIXED(11,2);

B_VAR1 = 5;
B_VAR2 = 4;
B_VAR3 = B_VAR1 * B_VAR2;

PUT SKIP LIST('4*5>'!!B_VAR3!!'<');

END SKY0281;

Actually from the Compiler Message, we see in this example the temporary datatype:

5655-W67 IBM(R) Enterprise PL/I for z/OS SKY0281: PROC OPTIONS(MAIN);
Compiler Messages
Message Line.File Message Description
IBM2819I I 11.0 Multiplication of FIXED DEC(10,0) and FIXED DEC(11,2)
may raise FIXEDOVERFLOW.


so it is DEC FIXED(10,0).