$ perl -le '$foo = 11.3700000000000016; print $foo'
11.37
$ perl -le '$foo =   .00000000000016; print $foo'
1.6e-13
$ perl -le '$foo =  1.00000000000016; print $foo'
1.00000000000016
$ perl -le '$foo =  1.3700000000000016; print $foo'
1.37
$ perl -le '$foo =  1.370000000000016; print $foo'
1.37000000000002
$ perl -le '$foo =   .370000000000016; print $foo'
0.370000000000016