display the fact that the (double precision) values held by $d_1 and $d_2 are exactly equivalent to the rational value 3602879701896397/36028797018963968
I think your assumption is wrong.
$ say 3602879701896397/36028797018963968 == 0.100000000000000006;
$ say 10000000000000001/100000000000000000 == 0.10000000000000001 == 0
+.10000000000000001e0 == 0.1 + 1e-18;
and the other operators don't care about the type of the number they work with, they will coerce every operand to Num anyway. However
$ say 3602879701896397/36028797018963968 =~= 0.10000000000000001;
There is also a unicode variant of the approximately-equal operator
but it won't display correctly here.
You can lead your users to water, but alas, you cannot drown them.
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