use strict;
use warnings;

my $str = <<'HTML';
<td><img class="res" src="img/un/r/1.gif" title="Lumber"></td>
<td id=l4 title=60>63/1200</td>

<td class="s7"> <img class="res" src="img/un/r/2.gif" title="Clay"></t
+d>
<td id=l3 title=60>97/1200</td>
<td class="s7"> <img class="res" src="img/un/r/3.gif" title="Iron"></t
+d>
<td id=l2 title=60>61/1200</td><td class="s7"> <img class="res" src="i
+mg/un/r/4.gif" title="Crop"></td>
<td id=l1 title=43>106/1200</td>
HTML

my @matches = $str =~ m!\d+/\d+!g;

print join "\n", @matches;
[download]

Prints:

63/1200
97/1200
61/1200
106/1200
[download]

using your regex with \d+\\d+ corrected to \d+/\d+.