Discovered this issue while testing previous bug reports on the Visual Studio 2017 beta.

Code
; Source of code:
; https://forums.mirc.com/ubbthreads.php/topics/258149

//echo -ag $calc(16/6) --- $base($calc(16/6),10,10)

Results from my testing:

Code
; 7.02 - 7.45
; 2.666667 --- 2.666666999999999

Code
; 7.46
; 2.666666666667 --- 2.666666666667

Code
; 7.47 - 7.72
; 2.666667 --- 2.666667

Code
; 7.73 - 7.75.345
; 2.666667 --- 2.666666