Simple perl math caculation question

[Vincent Li]

I am trying to experiment a simple perl math caculation script I wrote:
#!/usr/bin/perl
use strict;
use warnings;

my %operator = (
    minus => '-',
    add => '+',
    multiply => '*',
    divide => '/',
);

my $big = 5;
my $small = 2;

for (values %operator) {

my $result = $big  $_ $small;

print "$result\n";

}

I know the "my $result = $big $_ $small" is not valid perl expression,and 
may look stupid :) but you get the idea that I want to achieve that 
because the operator is stored in a varible and unknown to me. I guess 
there is other way around, I am just not aware of.

Thanks in advance

Vincent

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