Cálculo do Fatorial

```py
num = int(input("Number: "))
result = num

while num != 1:
num -= 1
result *= num

print("Resultado Fatorial: {}".format(result))
```

The issue contains a Python script that calculates a factorial. The script likely has a bug in its logic or output formatting. Start by running the provided code to see its current behavior. Then, compare it to the expected factorial calculation (e.g., handling input 0 or 1). Modify the script in the repository's Python exercise files, test with a few inputs, and ensure the output matches the correct factorial results.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.