>>Currency values have a relatively large range; 15 digits for the integer part, and 4 decimals.
>>
>>VFPs built-in data types don't support a higher precision. Double becomes inaccurate for large numbers. Something like 15 to 16 digits precision, but the last digits are always doubtful.
>>
>>My download #10044 allows for calculations with an almost unlimited number of digits (the limit is the VFP array limit), but it is relatively slow, compared with the VFP built-in data types and calculations.
>
>( 040909750000200257 + 6 ) * 2430
>
>
>Hi Hilmar;
>
>Thanks for your repli..
>

>Number1 = transform(040909750000200257+6,"@L 999999999999999999")
>Number2 = "2430"
>? Number1, "*", Number2, "=", oMath.Multiply(Number1, Number2)
>

>
>Your routine give me as result:
>99410692500486631800
>
>Different from windows calculator:
>99410692500486639090
>
>Is there something that I can do to deal with this?

Yes. Do the addition with the Math Object, too. Your transform(...) code already gives wrong results to the Math Object.

Also, the Windows Calculator seems to give the correct number in this case, but for larger numbers, it might give you inexact results, too.