>perl -MPOSIX -MTest::More -le "cmp_ok(1.4/10, '==', 0.14, 'division'); done_testing();"
not ok 1 - division
#   Failed test 'division'
#   at -e line 1.
#          got: 0.14
#     expected: 0.14
1..1
# Looks like you failed 1 test of 1.

##</code><code>##

>perl -MPOSIX -MTest::More -le "cmp_ok(1.4/10, '==', 0.14, 'division'); done_testing();"
not ok 1 - division
#   Failed test 'division'
#   at -e line 1.
#          got: 0.13999999999999999
#     expected: 0.14
1..1
# Looks like you failed 1 test of 1.

##</code><code>##

not ok 40 - tan(1) == -tan(-1)
#   Failed test 'tan(1) == -tan(-1)'
#   at ext/POSIX/t/math.t line 52.
#          got: 1.55740772465490223050697480745836
#     expected: 1.55740772465490223050697480745836

##</code><code>##

not ok 40 - tan(1) == -tan(-1)
#   Failed test 'tan(1) == -tan(-1)'
#   at ext/POSIX/t/math.t line 52.
#          got: 1.55740772465490223050697480745836023
#     expected: 1.55740772465490223050697480745836081