REQUEST: Significant Digit Calculator

[StephenG1CMZ]

To avoid the loss of precision in examples like 5/2 =2 to 1 sigfig, one could keep the additional digits but indicate the possible limitation of accuracy visually (for example, by changing the colour, or using bold).

So 5/2 is 2.[/red]5
Or 0.625*1.0 is 0.6[/red]25

That avoids the inaccurate 2 but gives a reminder that the result may exceed the precision of the input values, where needed.