I compiled it and get only 378 Bytes of code.
Maybe, you need another compiler.


<pre>
MEMORY MODEL: SMALL WITH FLOATING POINT ARITHMETIC


INPUT MODULES INCLUDED:
FLOAT.OBJ (FLOAT)
STARTUP.OBJ (?C_STARTUP)
C:8051KEIL_C51LIBC51FPS.LIB (?C?FPMUL)
C:8051KEIL_C51LIBC51FPS.LIB (?C?FPGETOPN)


LINK MAP OF MODULE: MAIN.OUT (FLOAT)


TYPE BASE LENGTH RELOCATION SEGMENT NAME
-----------------------------------------------------

* * * * * * * D A T A M E M O R Y * * * * * * *
REG 0000H 0008H ABSOLUTE "REG BANK 0"
DATA 0008H 000CH UNIT _DATA_GROUP_
IDATA 0014H 0010H UNIT ?STACK

* * * * * * * C O D E M E M O R Y * * * * * * *
CODE 0000H 0003H ABSOLUTE
CODE 0003H 001CH UNIT ?PR?MAIN?FLOAT
CODE 001FH 000CH UNIT ?C_C51STARTUP
CODE 002BH 014FH UNIT ?C?LIB_CODE