I would like to comment out multiple Cell Blocks at once (not multiple lines of code at once) in Google Colab, like the 4 separate Cell Blocks below:

I tried Ctrl / and it didn't work, I think that only works for multiple lines of code within 1 cell. I would like to essentially do Ctrl / on Multiple cells.
(And obviously if I only had these 4 cells to comment out, I would just manually go Ctrl / on them all. Except I have 50 cells that I need to comment out currently). Thank you for any help!