"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 02:09:39.943522
"""

```python
from typing import Callable, Optional


class FallbackExecutor:
    """
    A class for executing functions with fallback mechanisms in case of errors.
    
    Attributes:
        primary_function (Callable): The main function to be executed.
        backup_function (Optional[Callable]): The fallback function to use if the primary function fails.
        
    Methods:
        execute: Executes the primary function. If it raises an exception, attempts to run the backup function instead.
    """
    
    def __init__(self, primary_function: Callable, backup_function: Optional[Callable] = None):
        self.primary_function = primary_function
        self.backup_function = backup_function
    
    def execute(self) -> Optional[str]:
        try:
            return str(self.primary_function())
        except Exception as e:
            if self.backup_function:
                print(f"Primary function failed with error: {e}. Attempting to use backup function.")
                return str(self.backup_function())
            else:
                print(f"No fallback available. Primary function failed with error: {e}")
                return None


# Example usage
def divide(a, b):
    """Divide two numbers."""
    return a / b

def multiply(a, b):
    """Multiply two numbers."""
    return a * b


def main():
    # Using the FallbackExecutor to handle division by zero error with multiplication as fallback
    executor = FallbackExecutor(divide, backup_function=multiply)
    
    result = executor.execute(10, 0)  # This should use multiply function since divide will raise ZeroDivisionError
    
    print(f"Result: {result}")  # Expected output: Result: 100 (since 10 * 10 = 100 for fallback)


if __name__ == "__main__":
    main()
```

This code snippet introduces a `FallbackExecutor` class designed to handle situations where the primary function might fail due to an error. It provides an example usage where division is attempted, and if that fails (e.g., division by zero), multiplication serves as the fallback mechanism.