I am trying to round off a number at a set amount of significant digits and was using the Math::BigFloat module to accomplish this. My problem is that I am trying to use the round_mode of 'common', which is in the documentation but is says that it is not a valid round_mode.
For example: I am converting 0.006185625 to 6 significant digits...after using the 'common' round_mode it should go to 0.00618563.
Anyone have any ideas on how to get the common round_mode to work?