Maxima

[Albert Chan]

There is also a decimal float package, https://people.eecs.berkeley.edu/~fatema...decfp.lisp

(%i1) load(decfp);
"C:/Program Files/Maxima/share/maxima/5.38.0/share/decfp.lisp"

(%i2) 0.9 - 0.3 * 3              → 1.110223024625157 * 10^16
(%i3) 0.9b0 - 0.3b0 * 3       → -1.387778780781446b-17
(%i4) 0.9L0 - 0.3L0 * 3       → 0.L0