def format_decimal(number, precision):
    """
    Format a decimal number to a specific precision.

    Args:
        number (float): The decimal number to be formatted.
        precision (int): The desired number of decimal places.

    Returns:
        str: The formatted decimal number.
    """
    return f"{number:.{precision}f}"

# Example usage:
number = 3.141592653589793
precision = 3
formatted_number = format_decimal(number, precision)
print(formatted_number)  # Output: 3.142