my $_timestamp1 = '1189669351';
my $_timestamp2 = '1189355751';

printf "rounded: %.0f\n",($_timestamp1 - $_timestamp2) / 86400;
print "truncated: ",int( ($_timestamp1 - $_timestamp2) / 86400),"\n";
print "float: ",(($_timestamp1 - $_timestamp2) / 86400),"\n";
__END__
rounded: 4
truncated: 3
float: 3.62962962962963
[download]

I think using a module for such a simple operation is a bit overkill, but that's just me.

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}