use Test::More *;

is(''+(3.14-0.14), '3');
is(''+(3.14-0.12), '3.02');
is(''+(3.14-2), '1.14');

is(''+(1-3.4), '-2.4');
is(''+(1+3.4), '4.4');
is(''+(1*3.4), '3.4');
is(''+(0.1/0.5), '0.2');

done_testing();