Thanks you so much for explaining in detail.
but when I write an simple demo like this ：
DATA:
xkbetr LIKE konp-kbetr,
xkwert LIKE komv-kwert,
KZWI6 LIKE komp-kzwi6.
kzwi6 = '5151.11'.
xkbetr = '170.00'.
xkwert = 100000 * ( kzwi6 ) / ( xkbetr + 100000 ).
the result is 5142.36 but the result in program RV64A904 is 4402.66 so I was confused how this calculation go ?