给定一段英文文本，请使用Python程序将其中所有的单词转换为大写并输出结果。


"Python is a popular programming language that is used in a wide range of fields."
```python
text = "Python is a popular programming language that is used in a wide range of fields."
upper_text = text.upper()
print(upper_text)
``` 

Output: "PYTHON IS A POPULAR PROGRAMMING LANGUAGE THAT IS USED IN A WIDE RANGE OF FIELDS."