How to print # in non-english keyboard layout

Hello to everyone.
I have two keyboard layouts: us and ru.
Is it possible to print # symbol in non-english layout?

I use Obsidian and for writing hash tags I switch to English layout. That's inconvenient.
In Windows I can use combination ALT-35
 
According to /usr/local/share/X11/xkb/symbols/ru the 'numbersign' (#) is on the second level of the '3' key (i.e. shift + 3) for the 'common' variant of the ru layout. For other variants it's sometimes on the third level (alt + 3).
 
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