How to create a calculated item using item.create?

Question

I am familiar with creating a calculated item with the GUI, but now I want to do it with the API. There is a "formula" field for an item object, but its type is int/float as stated in the document. So where do I put the formula needed by a calculated item?enter image description here

Answer 1

As per the Zabbix manual, it's the params field.