How to Async Calculate Factorial in Apex - Code Snippet

// Task: Async Calculate Factorial
// Language: Apex

public void async_calculate_factorial() {
    // Implementation for Async Calculate Factorial
    Object result = ...; // Initialize variable
    // TODO: Implement core logic here
    // Step 1: Prepare data
    // Step 2: Process Async Calculate Factorial
    System.debug("Done");
}