The below code is developed based on your logic and I am getting the following output. But I am not getting your expected output. Check whether your expected output is correct.
use strict;
use warnings;
my %p = (A => 2.74, B => 2.64, C => 2.5);
my @range = (50,55,60,65,70,75,80,85,90);
while(my $str = <DATA>){
chomp($str);
print "\nInput : $str\n";
$str =~ s/(\d+)(\w)/($2 . '*') x $1/eg;
$str =~ s/(\w)(\w)/$1 . '*' . $2 . '*' /eg;
$str =~ s/(?!\*)$/*/;
$str =~ s/(.)\*(?!\1)/"$1\*\(".$range[ord($1) - 65]."\/100\)\*"/eg
+;
$str =~ s/\*+$//;
$str =~ s/$_/$p{$_}/g for (keys %p);
print "Expression: ".$str ."\n";
print "Output : ",eval$str ,"\n\n";
}
__DATA__
4ABC
2A2B2C
3C
ABC
Output is:
Input : 4ABC
Expression: 2.74*2.74*2.74*2.74*(50/100)*2.64*(55/100)*2.5*(60/100)
Output : 61.38045890064
Input : 2A2B2C
Expression: 2.74*2.74*(50/100)*2.64*2.64*(55/100)*2.5*2.5*(60/100)
Output : 53.96012424
Input : 3C
Expression: 2.5*2.5*2.5*(60/100)
Output : 9.375
Input : ABC
Expression: 2.74*(50/100)*2.64*(55/100)*2.5*(60/100)
Output : 2.98386
Regards, Velusamy R. eval"print uc\"\\c$_\""for split'','j)@,/6%@0%2,`e@3!-9v2)/@|6%,53!-9@2~j';
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