How to implement this grid using flexbox?

Question

css

Good day, I am a beginner web developer, I want to ask for help in creating a grid of a training layout on flex.
I can’t place the right block with products as on the layout, I’ve already tried everything, it constantly lines up stretching over the entire page, it’s impossible to place it next to the filter :(

Answer 1

https://html5book.ru/css3-flexbox/#flex-wrap
I gave a link to the right chapter, but I really hope that you will read the entire article.