Create a calculator

I need that from two numbers that the user enters he can perform mathematical operations.

@jhazielgg ,

Please elaborate on your requirement so that we can help you further.

Regards,
Yoga Ramya

Hi thanks. Being a little more specific, I want to create a calculator, people answer a form, where they select three numbers and select the type of operation, once selected the chat shows the user the result of the operation. What code do I need to create and in which node should I place the operation?