How do I make a subnet worksheet HTML code page that looks exaclty below picture?

I couldn't 开发者_运维知识库make a perfect HTML code, just like in the worksheet. I am just a beginner. Can anyone help make these examples below? I greatly appreciate it from the bottom of my heart.

I used visual studio code. Don't make complex HTML coding, just the basic. Thank you from a struggling student.

[HTML StepsExact Look](https://i.stack.imgur.com/urzwe.png)