Unexpected division quotient

IBM i 7.1

There is a situation where we have an integer sent to us carrying an amount value. Another field contains the number of implied decimals in that integer.

Here is what I'm seeing:

dividend = 418
divisor = 10 to the power of 4 (implied decimal value) = 10000.
quotient = .041799 (but I'm expecting .041800)

C = a / (10 ** ds_Inp.RevDec);
// C = .041799


I have tried with and without the H-spec ExPrOpts( *ResDecPos ).

When I break down the code into two lines, it does work. And 2 lines is fine, b/c this is still better than the 19 lines of code we used to have, but I was would like to understand why this is happening.

Example of how to get .041800.
B = (10 ** ds_Inp.RevDec);
C = a / b;
// C = .041800

Thanks,
Kurt Anderson
Sr. Programmer/Analyst
CustomCall Data Systems, a division of Enghouse Ltd.