This was posted in a weed community first and then crossposted here. Because for a stoner the important question is "how much does a gram of weed cost?". For a scientist, more importantly the question is "what system of measurements do you use?", or, specifically, "how much [mass] is a gram [in your unit system]?"

There were some people at my university for whom it was a science question. And they paid about €1350 per gram and the first thing they did with it was dissolve it in sulphuric acid.

But (taken literally by my autistic ass) it's one we already know the answer to because we're the ones who defined all the units in the first place. A gram is a unit of mass, not weight, which is why its value is the same regardless of the value of g. That's also why it's always measured with a balance rather than a scale. It's based on the Planck constant -- which is, well, constant.