roundoff errors



Hello,

I recently abused Maxima 5.16.3 as a pocket calculator and noticed that 
it produced strange roundoff errors in simple floating point 
multiplications:

wxMaxima 0.7.6 http://wxmaxima.sourceforge.net
Maxima 5.16.3 http://maxima.sourceforge.net
Using Lisp GNU Common Lisp (GCL) GCL 2.6.8 (aka GCL)

(%i1) 325.65+471.67;
(%o1) 797.3199999999999

(%i2) 17.91+34.77;
(%o2) 52.68000000000001

Kind regards

Uwe