'string'
"another string"
q(yet another)
qq<or like this>
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etc. Numbers can be specified in different ways, too:

12
1_2
0b1100
0x0c
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All of them are just different ways how to represent the number 12. The problem is that 0x0c as a string , i.e. in quotes, is not interpreted as a number, but as a string. To convert it to a number, you need to use the oct function:

#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

my @arr = qw( 10 10 20 0x47 1 30 45 45 );
my @converted = map /^0x/ && oct || $_, @arr;
say for @converted;
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($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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