How much is a canto?

Excuse me, but I'm a bit confused about the term "canto." Could you please clarify what you mean by it in the context of cryptocurrency or finance? Is it a specific unit of measurement, a term used to describe a certain type of transaction, or something else entirely? If it's a unit of measurement, could you elaborate on what it's used to quantify, and if there's a standard conversion rate to other more commonly used units like Bitcoin or fiat currencies? Additionally, is "canto" a widely recognized term in the cryptocurrency or finance industry, or is it specific to a particular platform or exchange?