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On Tue, Feb 21, 2017 at 11:16:42PM -0800, Martin wrote: > On 02/21/2017 12:09 PM, 崔 献军 wrote: > > l am going on a project on calc expression. but i cannot desire which one i should use. > > in strugging... > > > > 崔献军 > > > Use `bc`. This is the correct answer.