How to perform 'Async Subtract Dates' in Perl.
# Task: Async Subtract Dates
# Language: Perl
sub async_subtract_dates() {
# Implementation for Async Subtract Dates
my $ result = ...; # Initialize variable
# TODO: Implement core logic here
# Step 1: Prepare data
# Step 2: Process Async Subtract Dates
print("Done");
}