Simultaneous meeting capacity

I’m new using jitsi and I wonder how many 2-3 person meeting single DO server can handle?

Ram 8GB 4vCPU Transfer 5TB Storage160GB

HD calls with no chats, streaming or fancy stuff. Quality can be lowered too.

Does doubling the Ram and CPU mean 2x simultaneous meetings?

Any tips on this how single server handles small meetings quantity wise?