How to install php extension Gmp

I bought a software and in the server requirements I need gmp. I searched around in the forum and apparently sudo apt-get install php7.4-gmp does it. Do I run this as root?

apt-get install php8.2-gmp
in this case

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do I ssh in the hestiacp user accout where the domain is hosted and cd into the public html and do that account or do I do it for the main sudo account.

Use root